动态第436页 - 绿手指 - 养花技巧、花生病了怎么办、花园打理和设计

2017年12月14日

[图片]茉莉花素洁、浓郁、清芬、久远，它的花语表示忠贞、尊敬、清纯、贞洁、质朴、玲珑、迷人。许多国家将其作为爱情之花，青年男女之间，互送茉莉花以表达坚贞爱情。它也作为友谊之花，在人们中间传递。把茉莉花环套在客人颈上使之垂到胸前，表示尊敬与友好，成为一种热情好客的礼节。茉莉花的花语为官能的、你是我的，因为它的香味迷人，很多人会把她当成装饰品一样地别在身上。在婚礼等庄重场合，也是一种很合宜的装饰花。也经常被使用在新娘捧花上。茉莉花茶是一种香味极浓的茶。但是，真正用于这种茶叶的，是另一种与茉莉花品种很接近的花。清的外形，让你很难想象原来她有着如此香甜醇美的花香。散发着就像其花语所说的“官能的”香味。所以，自古以来，就是各种香水中的主要原料之一。 [图片]茉莉花能放在室内吗能够放在室内茉莉花是可以放在室内养殖的，它产生的挥发性油具有杀菌作用，可以有效的杀死室内的病菌。此外，茉莉开放时伴有阵阵清香，可以使人放松、精神愉快。但是就茉莉花本身的生长习性来说，应该把它放在阳光充足的阳台上，或者定期拿出去晒太阳，以保证它的正常生长。不宜放在卧室长时间闻茉莉花的气味可能会导致脱发，因此，茉莉花最好不要放在室内养殖。并且卧室里一般空间比较小，可能会诱发花粉过敏等症状。孕妇能闻茉莉花吗茉莉花有毒吗对于茉莉花有没有毒这个问题，答案是当然是没有毒的了。并且茉莉花还有很多的功效和作用呢。茉莉花性寒，味香淡，能够理气止痛、温中和胃、消肿解毒，有理气安神、润肤香肌的功效。它对于便秘也有帮助，使排便顺畅，可改善昏睡及焦虑现象，对慢性胃病、经期失调也有功效。由于它香气怡人，也经常被用来当做香水的基调，欧美流行用茉莉花精油按摩身体。茉莉花与孕妇孕妇总是受到家里特殊保护的人群，孕育着下一代，因此身体机能可能会有一定的下降，需要格外的注意。孕妇不能饮用茉莉花茶。民间流传产前喝茉莉花茶能够加快生产，实际并不然。产前喝茉莉花茶可能会造成大出血，影响生命安全。此外虽然茉莉花香味儿迷人，但是孕妇不宜久闻，最好是少接触具有强烈花香的茉莉。为了宝宝的健康，只能远观茉莉不亵玩啦！

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Miss Chen

2017年12月14日

Description: This perennial plant is 1½–3½' tall, branching occasionally. The ridged stems are pubescent. The alternate compound leaves are odd pinnate, and 5-9" long, with about 21-31 leaflets. The oblong leaflets are about 1½" long and 3/8" across, with smooth edges. From the upper axils of the compound leaves there occasionally develops a whorled raceme of flowers from a stout stalk. A raceme (including the stalk) is usually about 1-2" longer than the compound leaves subtending it, or about 7-11" long. A typical raceme is crowded with about 75 creamy flowers, which may have yellow or green tints. Each flower is about ¾" long and tubular-shaped, although jutting slightly upward toward the outer tip. It consists of five petals, including a curved upper hood, a lower keel, and close-fitting side petals. The blooming period occurs during the summer and lasts about 2-3 months. There is no noticeable floral scent. The flowers are replaced by stout oval pods with long pointed tips, which are held nearly erect on the stalk. The root system consists of a taproot. Cultivation: The preference is full or partial sun and mesic conditions. Canada Milkvetch grows well on most kinds of soil, and probably fixes some nitrogen. It's a robust plant, although the foliage sometimes turns prematurely yellow. This plant has a tendency to sprawl, unless it receives support from adjacent vegetation. Range & Habitat: The native Canada Milkvetch occurs occasionally in the northern half of Illinois, but it is rather uncommon in most areas of southern Illinois (see Distribution Map). Habitats include moist to slightly dry black soil prairies, sand prairies, typical and sandy savannas, thickets and woodland borders, moist meadows near rivers, and abandoned fields. [图片]Faunal Associations: Primarily bumblebees visit the flowers for nectar. Other long-tongued bee visitors include honeybees and Megachile spp. (Large Leaf-Cutting Bees). Insects with shorter mouthparts have trouble reaching the nectar, nor is the pollen easy to access. Unlike many milkvetches of the Western states, the foliage of Canada Milkvetch is non-toxic and palatable to mammalian herbivores, including deer, groundhogs, rabbits, and livestock. This plant may be difficult to establish where these animals occur in abundance. The seeds may be eaten occasionally by the Wild Turkey and other upland gamebirds, as well as small rodents, such as the Thirteen-Lined Ground Squirrel; however, such observations are confined largely to the Western states, where Astragalus spp. are more abundant. [图片]Photographic Location: The wildflower garden of the webmaster in Urbana, Illinois. Comments: There are very few Astragalus spp. that occur in Illinois. Canada Milkvetch has a distinctive appearance on account of its size (up to 3½' tall) and abundant creamy flowers (about 75 per raceme). Some pale-flowered vetches are superficially similar in appearance, such as Vicia carolina (Carolina Vetch). However, vetches are vine-like plants with tendrils, while Canada Milkvetch is a semi-erect plant without tendrils (although it may clamber over adjacent vegetation, nonetheless). Another difference is the inflorescence: the raceme of Canada Milkvetch is whorled with about 75 flowers, while Vicia spp. have one- or two-sided racemes with fewer flowers.

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Miss Chen

2017年12月14日

Description: This perennial plant is 1½–2' tall and unbranched. The central stem is light green to light purplish green and more or less pubescent. Several pairs of opposite leaves occur along the entire length of the stem; they are more or less ascending. The leaves are often folded upward along their margins, where they are often wavy (up and down). Individual leaves are up to 5" long and 1½" across; they are linear-lanceolate to lanceolate in shape and smooth (entire) along their margins. The upper leaf surface is medium green, while the lower leaf surface is light green; both surfaces are short-pubescent to nearly glabrous. The petioles are about 3 mm. (1/8") long, light green to light reddish green, and pubescent. The primary veins of the leaves are pinnate, while their secondary veins form a reticulated network that is visible on their undersides. From the axils of middle to upper leaves, there are nodding umbels of flowers spanning 1–1¾" across (only one umbel per pair of leaves). These umbels have short pubescent peduncles up to 6 mm. (¼") long. A typical plant will have 1-4 umbels; each umbel has 15-45 flowers on hairy pedicels about ½" long. Individual umbels are broadly obconic to half-globoid in shape and dome-shaped in front, rather than flat-headed. Each flower is about 8 mm. long and 3 mm. across, consisting of 5 erect hoods, 5 deflexed petals, 5 deflexed sepals, and the reproductive organs. The flowers are light green to green, becoming yellowish green or purplish green as they age. Individual hoods are lanceolate-oblong in shape; they are without horns. The hoods surround a central reproductive column on all sides; this column contains masses of winged pollinia (packets of pollen). The deflexed petals are lanceolate in shape; when the flower is fully open, they hide the shorter sepals. The sepals are linear-lanceolate in shape, light green to purplish green, and hairy. The blooming period occurs during early summer, lasting about 3 weeks. Afterwards, the flowers that have been cross-pollinated successfully (if any) are replaced by follicles (seedpods that open along one side). The follicles are up to 3½–5" long and ½–¾" across; they are narrowly lanceoloid and usually short-pubescent. During the autumn, these follicles split open to release their seeds. The seeds are dark brown, flattened-ovoid in shape, and winged along their margins. At their apices, the seeds have tufts of white hair; they are distributed by the wind. The root system consists of a central taproot. This plant usually occurs as scattered individuals, rarely forming colonies. [图片]Cultivation: The preference is full sun and dry-mesic to dry conditions. This plant will also tolerate partial sun and mesic conditions. If anything, poor soil is preferred, containing gravelly or sandy material, as this reduces competition from taller plants. However, rich loam is tolerated if it is well-drained. After the blooming period and during the development of seedpods, this plant gradually deteriorates. Range & Habitat: The native Short Green Milkweed is widely distributed in Illinois, but it is absent from some eastern and central counties (see Distribution Map). In areas where it occurs, this plant is rare to occasional. Habitats include openings in upland forests that are rocky or sandy; upland black soil prairies, sand prairies, gravel prairies, and hill prairies; barrens, limestone glades, and sand dunes; and abandoned fields. Short Green Milkweed usually occurs in high quality habitats, rather than degraded areas. Occasional wildfires are probably beneficial by reducing competition from woody vegetation. [图片]Faunal Associations: The nectar of the flowers attracts primarily bumblebees, which are the primary pollinators (Robertson, 1929). Ants are also attracted to the nectar, but they are not effective at cross-pollination. Some insects feed destructively on Short Green Milkweed and other milkweeds (Asclepias spp.). For example, larvae of a long-horned beetle, Tetraopes texanus (Texas Milkweed Beetle), bore through the stems of Short Green Milkweed, while caterpillars of a butterfly, Danaus plexippus (Monarch), occasionally feed on the leaves. Other insects that feed on milkweeds are listed in the Insect Table. Mammalian herbivores avoid consumption of the foliage because its milky latex contains toxic cardiac glycosides and it is bitter-tasting. Because caterpillars of the Monarch butterfly are able to sequester these toxic chemicals, the adults of this insect are usually avoided by birds. [图片]Photographic Location: The photographs were taken at the Prospect Cemetery Prairie in Ford County, Illinois, and the Coneflower Hill Prairie in Shelby County, Illinois. Comments: This non-showy plant is unlikely to receive favor from the mass market in horticulture, but it is nonetheless quite interesting to examine. This milkweed species is rather variable across different localities; there is a variety with narrow leaves that occurs in sandy areas near Lake Michigan. Short Green Milkweed (Asclepias viridiflora) can be distinguished from many species of milkweeds by its nodding umbels of greenish flowers. The rare Mead's Milkweed (Asclepias meadii) has this characteristic, but its flowers are more wide (about 6 mm. across) and the hoods of its flowers have horns. Another milkweed species, Tall Green Milkweed (Asclepias hirtella), produces nodding umbels of greenish flowers, but its umbels are more fully globoid in shape, and its leaves are usually more linear and narrow than those of Short Green Milkweed.

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Miss Chen

2017年12月14日

Description: This perennial herbaceous plant is ½–2' tall and more or less erect; it is either unbranched or sparingly branched along the upper half of its central stem. The central stem is yellowish green or medium green and terete; it has vertical lines of short pubescence. Whorls of 4-6 leaves occur along the nodes of the central stem; because the internodes of this stem are fairly short, these leaves are produced in abundance. Relative to the orientation of the central stem, the leaves are usually ascending, although sometimes they are widely spreading or drooping. The leaves are 2-3" long, 2-3 mm. across, and linear in shape; their margins are entire (toothless) and strongly revolute (rolled downward). Sometimes whorls of smaller secondary leaves are produced from short lateral stems that develop from the axils of leaves along the central stem. The upper leaf surfaces are yellowish green or medium green and glabrous to sparsely short-pubescent; they are narrowly grooved along the middle where the midribs occur. The lower leaf surfaces are whitish green and short-pubescent; they are partially obscured by the rolled leaf margins. The leaves are sessile or they have very short petioles (less than 2 mm. long). From the axils of middle to upper leaves, umbels of flowers are produced on short peduncles (flowering stalks); there can be 1-4 umbels of flowers at each node. Individual umbels span ¾–1½" across, consisting of 7-20 pedicellate flowers. Each flower is about 5-6 mm. across and 8-10 mm. long, consisting of 5 sepals, 5 petals, 5 hoods with horns, and a central reproductive column. The sepals are light green, short-pubescent, and lanceolate in shape; sometimes they are tinted purple toward their tips. These sepals are visible at the bases of flower buds, but they are hidden by the petals when the flowers bloom. The petals are white or greenish white, sometimes with pale purplish tints toward their tips; they are oblong-elliptic in shape and strongly declined (bent downward), curving slightly upward toward their tips. The erect white hoods are open-tubular in shape and somewhat oblique, their lower sides facing the center of the flower. The slender white horns are sickle-shaped and inwardly curved; there is one exserted horn per hood. The short reproductive column is white at its apex and light green below. The slender pedicels of the flowers are light green to nearly white, sometimes becoming purplish at their bases; they are 8-12 mm. long, terete, and short-pubescent. The peduncles are ½–1½" long, light to medium green, glabrous to short-pubescent, terete, and ascending. The blooming period occurs from early to late summer, lasting about 1-2 months. There is little or no floral scent. Afterwards, successfully cross-pollinated flowers are replaced by ascending to erect follicles (seedpods that open along one side). These follicles are 3-4" long and about ½" across; they are narrowly lanceoloid in shape and fairly smooth (lacking warts or soft prickles). At maturity during autumn or winter, these follicles split open to release their seeds to the wind. Mature seeds are about 4-5 mm. long, ovate-flattened in shape, brown, and narrowly winged along their margins; their apices have large tufts of white hair. The root system is fleshy-fibrous and long-rhizomatous. Colonies of clonal plants are often produced from the rhizomes. [图片]Cultivation: The preference is full sun, mesic to dry conditions, and soil containing loam, clay-loam, sand, or gravel. Infertile soil is actually preferred because it reduces competition from taller plants. During hot dry weather, the lower leaves may turn yellow and fall off, or the foliage of the entire plant may become yellowish green. In open sunny areas with exposed soil, this plant can spread aggressively. Range & Habitat: The native Whorled Milkweed occurs occasionally throughout most of Illinois, except for a few southern counties (see Distribution Map), where it is rare or absent. Habitats include upland prairies, sand prairies, gravel prairies, hill prairies, openings in rocky upland forests, sandy savannas, limestone glades, rocky bluffs along major rivers, bluegrass meadows, pastures and abandoned fields, grassy slopes along highways, and waste areas. Whorled Milkweed is a pioneer species that prefers open disturbed areas. [图片]Faunal Associations: The nectar of the flowers attracts many kinds of insects, including honeybees, bumblebees, Halictid bees (Halictus spp., Lasioglossum spp.), Halictid cuckoo bees (Sphecodes spp.), sand-loving wasps (Tachytes spp.), weevil wasps (Cerceris spp.), Sphecid wasps (Sphex spp., Prionyx spp.), Five-banded Tiphiid Wasp (Myzinum quinquecinctum), Northern Paper Wasp (Polites fuscatus), spider wasps (Anoplius spp.), Eumenine wasps (Euodynerus spp., etc.), Syrphid flies, thick-headed flies (Physocephala spp., etc.), Tachinid flies, flesh flies (Sarcophagidae), Muscid flies, Painted Lady (Vanessa cardui) and other butterflies, Peck's Skipper (Polites peckius) and other skippers, Squash Vine Borer Moth (Melittia cucurbitae) and other moths, and Pennsylvania Soldier Beetle (Chauliognathus pennsylvanicus); sources of information include Robertson (1929) and personal observations. Among these floral visitors, bees and wasps are usually more effective at cross-pollination. Some insects feed destructively on the foliage, flowers, seedpods, and other parts of Whorled Milkweed. These species include the Small Milkweed Bug (Lygaeus kalmii), Milkweed Leaf Beetle (Labidomera clivicollis), Yellow Milkweed Aphid (Aphis nerii), and a moth, the Delicate Cycnia (Cycnia tenera). Although this insect does not occur in Illinois, in the southwestern United States, the Horsetail Milkweed Longhorn (Tetraopes discoideus) feeds on Whorled Milkweed and closely related milkweed species (Asclepias spp.); sources of information include Betz et al. (1997), Yanega (1996), and personal observations. Mammalian herbivores usually avoid the foliage of Whorled Milkweed as a food source because it is one of the more toxic milkweed species. [图片]Photographic Location: Photographs were taken at the webmaster's wildflower garden in Urbana, Illinois, and a bluegrass meadow near Parkland College in Champaign, Illinois. Comments: This small milkweed blooms later in the year than most milkweed species (Asclepias spp.), and its small umbels of flowers attract many kinds of insects, including butterflies. Whorled Milkweed (Asclepias verticillata) superficially resembles the common Field Horsetail (Equisetum arvense) because of its whorled linear leaves. It can be distinguished from this latter species by the milky latex of its foliage and the later development of its flowers and seedpods. Field Horsetail is a spore-bearing plant that lacks true flowers. Whorled Milkweed is readily distinguished from other milkweed species in Illinois by its more narrow leaves (only 2-3 mm. across). Narrow-leaved Milkweed (Asclepias stenophylla) is an exception, because its linear leaves are almost as narrow. However, this latter species has leaves that are alternate to nearly opposite along its stems, rather than whorled. So far, it has been found in only a few counties of western Illinois.

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Miss Chen

2017年12月14日

Description: This herbaceous perennial plant is 1-2½' tall. Young plants develop from a single central stem, while older plants tiller at the base, sending up multiple erect to ascending stems from a large taproot. These stems are unbranched below, becoming branched above where the flowers occur. The stems are light green to dull reddish purple, terete, and more or less covered with spreading hairs. Densely distributed along these stems, are alternate leaves that differ little in size. These leaves are 2½–3½" long and ½–¾" across; they are linear-oblong to lanceolate-oblong in shape, while their margins are entire (toothless). The tips of the leaves are acute, while their bases are slightly cordate, truncate, or rounded. The leaves are sessile, or they have short petioles up to 3 mm. long. The upper leaf surface is medium to dark green and glabrous to sparsely short-pubescent, while the lower leaf surface is light to light-medium green and mostly short-pubescent. Along the lower sides of the major veins, this pubescence is somewhat longer. The foliage of this plant lacks a milky latex. Usually several umbels of flowers develop from the upper stems and the axils of upper leaves. These umbels span 1–2½" across, consisting of 8-25 flowers each; they are slightly dome-shaped and often horizontally adjacent to each other. Each flower consists of 5 sepals, 5 petals, 5 hoods with horns, and a central reproductive column that is white to light green and short. The sepals are light green, hairy, and lanceolate in shape; they are largely hidden when the flowers open. The petals are more or less orange, lanceolate in shape, and declined (bent downward). The hoods are more or less orange, erect, and curved-ovate, forming open oblique tubes. The horns are more or less orange, sickle-shaped, incurved, and exserted from the hoods (one horn per hood). Usually the petals, hoods, and horns are orange, but sometimes they are reddish orange or yellowish orange. The pedicels are ¾–1½" long, light green or light reddish purple, terete, and more or less covered with spreading hairs. At the base of these pedicels, there are several spreading bracts up to 8 mm. long; they are green, linear-lanceolate in shape, and pubescent. The peduncles of the umbels are ½–2½" long, light green to dull reddish purple, terete, and hairy. The flowers bloom during early to mid-summer and sometimes a second time during late summer to early autumn. The flowers are relatively long-lasting, but they have no noticeable fragrance. Flowers that have been successfully cross-pollinated are replaced by follicles (seedpods that open along one side). These follicles are 4-6" long and ½–¾" across at maturity; they are initially light green, but later turn brown. The follicle surface is smooth and short-pubescent. These follicles eventually split open to release their seeds to the wind. Mature seeds are about 4 mm. long, flattened-oval in shape, brown, and narrowly winged along their margins; the apices of these seeds have large tufts of white hair. The root system consists of a woody taproot that is thick and knobby. This taproot can extend several feet below the ground surface. [图片]Cultivation: The preference is full sun, mesic to dry conditions, and an acidic soil that is sandy or rocky. However, this plant will adapt to other kinds of soil, including those that contain loam or clay, if they are well-drained. Although this plant develops somewhat slowly, it is easy to cultivate in open sunny areas once it becomes established. Tolerance to hot dry weather is excellent. If the taproot of a young plant is planted too close to the soil surface, it may become damaged by frost due to heaving of the soil. Range & Habitat: The native Butterfly Milkweed is occasional to locally common in Illinois, except for the western section of the state, where it is less common (see Distribution Map). Habitats include upland sand prairies, hill prairies, cemetery prairies, sandy savannas, open rocky woodlands, shale and sandstone glades (in southern Illinois), abandoned sandy fields, roadside embankments, and areas along railroads. Because of the showy orange flowers, Butterfly Milkweed is often cultivated in gardens. This milkweed is found in both disturbed areas and high quality natural areas. Occasional wildfires are probably beneficial in maintaining populations of this plant as this reduces competition from woody vegetation and taller herbaceous vegetation. [图片]Faunal Associations: The flower nectar attracts honeybees, digger bees (Melissodes spp.), leaf-cutting bees (Megachile spp.), Halictid bees (including green metallic bees), thread-waisted wasps (Ammophila spp.) and other Sphecid wasps, and butterflies, including Fritillaries (Speyeria spp.), Swallowtails (Papilio spp.), and the Monarch (Danaus plexippus); see Robertson (1929). The Ruby-throated Hummingbird is also attracted to the flowers. Some insects feed destructively on the leaves, flowers and buds, seedpods, and other parts of Butterfly Milkweed. These insects include larvae of the Blackened Milkweed Beetle (Tetraopes melanurus), the Small Milkweed Bug (Lygaeus kalmii), the Large Milkweed Bug (Oncopeltus fasciatus), larvae of a butterfly, the Monarch (Danaus plexippus), and larvae of a moth, the Unexpected Cycnia (Cycnia inopinatus). Butterfly Milkweed is the preferred host plant of the preceding moth (see Yanega, 1996; Betz et al., 1997; Wagner, 2005). A polyphagous insect, the Curve-tailed Bush Katydid (Scudderia curvicauda), was observed to feed on the leaves of this milkweed (Gangwere, 1961); it may also feed on the flowers. While the foliage of Butterfly Milkweed lacks the toxic milky latex that is typical of other milkweeds (Asclepias spp.), mammalian herbivores nonetheless appear to avoid it. [图片]Photographic Location: The above photographs were taken at the webmaster's wildflower garden, Urbana, Illinois, and a flower garden at the Anita Purvis Nature Center of the same city. Comments: This is perhaps the showiest of the milkweeds (Asclepias spp.) because of the long-lasting and colorful flowers. Because Butterfly Milkweed (Asclepias tuberosa) is the only milkweed in Illinois that has orange flowers, it is easy to identify. This species is also unusual for a milkweed because its leaves are alternate and its foliage lacks a milky latex. Because of the absence of milky latex, it is often referred to as Butterfly Weed, rather than Butterfly Milkweed. The thick and bitter-tasting roots were used for various medicinal purposes in the past, including the treatment of pleurisy. As a result, another common name for this species is Pleurisy Root.

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Miss Chen

2017年12月14日

Description: This perennial herbaceous plant is 2-3' tall and unbranched. The erect central stem is relatively stout, terete, light green, and glabrous. Pairs of opposite leaves occur along the entire length of the stem; they are widely spreading to ascending (usually the latter). These leaves are 3-6" long and 1½–3" across; they are broadly oblong to ovate-oblong in shape, entire (toothless) and sometimes wavy along their margins, and either sessile or short-pedicellate. The leaf bases are rounded, while the tips of leaves are round or obtuse, tapering abruptly to a short narrow point. The upper and lower surfaces of the leaves are light-medium green and glabrous; the leaf texture is slightly fleshy. Leaf venation is pinnate; the prominent central veins are light green, pink, or purple. Each fertile plant develops 1-3 umbels of flowers (rarely more) from the apex of the central stem and the axils of the uppermost leaves. These umbels span 2–3½" across and they are slightly dome-shaped, consisting of 15-25 flowers each (rarely more). Each flower is about ½" across and ¾" long, or slightly smaller in size, consisting of 5 sepals, 5 petals, 5 hoods with horns, and a central reproductive column that is whitish. The sepals are light green to pinkish purple, lanceolate-ovate in shape, and glabrous. The petals are mostly pink to purplish pink (although white at their bases), lanceolate in shape, and declined (bent downward). The hoods are erect, open-tubular in shape, and pink to purplish pink. Each hood has an exserted horn that is sickle-shaped and incurved. The pedicels of the flowers are 1–1½" long, light green to reddish purple, and glabrous. The peduncles of the umbels are ½–3" long, light green, and terete. The blooming period occurs during early to mid-summer, lasting about 1 month. The flowers have a pleasant fragrance. Afterwards, cross-fertilized flowers (if any) are replaced by erect to ascending follicles (seedpods that open along one side) that are 3-4" long and 1–1¼" across at maturity. These follicles are light green (while immature), lanceoloid in shape, and smooth to bluntly warty. At maturity, the follicles split open to release their seeds to the wind. The seeds are brown, flattened-ovate in shape, and narrowly winged along their margins; they have large tufts of white hair at their apices. The root system is fleshy and rhizomatous, occasionally producing clonal offsets. Cultivation: The preference is full sunlight, moist to mesic conditions, and a rich loamy soil. While it can spread by means of its rhizomes, this plant is far less aggressive than Common Milkweed (Asclepias syriaca). During dry weather, some of the lower leaves may turn yellow and fall off the plant. This also happens when the seedpods develop, which is quite normal. Active growth occurs during the late spring and early summer. [图片]Range & Habitat: The native Prairie Milkweed is uncommon to occasional in the majority of counties in Illinois, but it is rare or absent in many counties of southern and NW Illinois (see Distribution Map). Habitats include black soil prairies, cemetery prairies, prairie remnants along railroads, moist meadows along rivers or near woodlands, thickets, and roadside ditches. Prairie Milkweed is an indicator plant of average to high quality prairies. Faunal Associations: Various insects visit the flowers of Prairie Milkweed for nectar, including bumblebees, cuckoo bees (Epeolus spp.), leaf-cutting bees (Megachile spp.), Halictid bees (including green metallic bees), Halictid cuckoo bees (Sphecodes spp.), sand wasps (Bembix spp.), Sphecid wasps, Ichneumonid wasps, thick-headed flies (Conopidae), Tachinid flies, flesh flies (Sarcophagidae), butterflies, skippers, moths, and ants (Robertson, 1929). The Ruby-throated Hummingbird also visits the flowers for nectar. Among the various visitors, bumblebees and other long-tongued bees are the most effective in cross-pollinating the flowers. Other insects feed on the roots, stems, leaves, flowers, and seedpods of Prairie Milkweed and other milkweeds (Asclepias spp.). The larvae of one species, the Milkweed Leaf-miner Fly (Liriomyza asclepiadis), tunnels through the leaves of Prairie Milkweed (Betz et al., 1997). Other insects that feed on milkweeds include long-horned beetles (Tetraopes spp.), the Swamp Milkweed Leaf Beetle (Labidomera clivicollis), the Milkweed Stem Weevil (Rhyssomatus lineaticollis), the Small Milkweed Bug (Lygaeus kalmii), the Large Milkweed Bug (Oncopeltus fasciatus), the Yellow Milkweed Aphid (Aphis nerii) and other aphids, caterpillars of a moth, the Delicate Cycnia (Cycnia tenera), and caterpillars of a butterfly, the Monarch (Danaus plexippus). The Insect Table provides additional information about these species. Because the foliage of Prairie Milkweed contains a white latex that is bitter-tasting and toxic, mammalian herbivores avoid consumption of this plant. [图片]Photographic Location: The photographs were taken at the Loda Cemetery Prairie in Iroquois County, Illinois. Comments: Prairie Milkweed (Asclepias sullivantii) somewhat resembles Common Milkweed (Asclepias syriaca) in appearance, but the former species has flowers that are slightly larger in size and its leaves are hairless on their undersides. Prairie Milkweed is usually a shorter plant than Common Milkweed, and it produces fewer umbels of flowers from the axils of its leaves. Another similar species is Purple Milkweed (Asclepias purpurascens). This latter species differs by having seedpods that are always smooth (rather than bluntly warty) and it has short hairs on the undersides of its leaves. In addition, the flowers of Purple Milkweed are slightly smaller in size than those of Prairie Milkweed, and they are usually more purple. Sometimes Prairie Milkweed has difficulty in forming seedpods because many flower-visiting insects are not very effective in removing and transferring pollinia from one plant to another. In addition, it is not uncommon for some of these insects to become entrapped on the flowers and unable to escape. Another common name of this plant is Sullivant's Milkweed.

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Miss Chen

2017年12月13日

[图片]文竹原产于南非，分布于中国中部、西北、长江流域及南方各地。其性喜温暖湿润和半阴通风的环境，冬季不耐严寒，不耐干旱，夏季忌阳光直射。文竹是具有极高的观赏植物，可放置客厅、书房，净化空气的同时也增添了书香气息。以根入药，可治急性气管炎，具有润肺止咳的功能。 [图片]文竹能不能放在卧室文竹有毒吗在家里养植物，大家都会担心一个安全性的问题。比如在家里养文竹，大家都会关心文竹是不是有毒。其实文竹是无毒的。它是一种净化植物，没有毒性，可以放心的在家里养护。不仅如此，在家里养殖文竹，还好处多多呢。文竹适不适合放在卧室在家里养殖文竹，摆放在不同的地方，会有不同的风水意义。当然具体要摆放在哪个位置，还是要根据主人自己的喜好来决定了。于是，就有人问了：我就喜欢在卧室里放上植物，那么，文竹适不适合放在卧室里呢？答案是可以的。文竹摆放在卧室里面，会给卧室增添一些绿色的气息。文竹的优雅与秀气，透漏着一股文弱的美，摆放在卧室里面赏心悦目，看着那青翠的绿色，就好像心情都会变好一样。除此之外，文竹摆放在卧室，还可以表示夫妻和睦、爱情长久。文竹象征永恒和永远不变，它是婚姻幸福甜蜜，爱情地久天长的象征。在卧室摆一盆文竹，表达夫妻天长地久的祝愿。所以，在卧室里摆放一棵文竹，也是不错的。文竹放在卧室的宜与忌文竹放在卧室的益处将一棵文竹放在卧室里，最大的作用还是装饰家居和观赏植物形态。在卧室里营造一种优美宁静的气氛，文竹功不可没。观赏文竹令人精神愉悦，对肝脏不适，精神忧郁，情绪低落者有一定的调节作用。文竹可以吸收二氧化硫、二氧化氮、氯气等有害气体，还能分泌出杀灭细菌的气体，减少感冒、伤寒、喉头炎等传染病的发生，具有很好的净化环境的作用，对人体的健康是大有好处的。在卧室里放上一盆文竹，作用还是蛮大的。文竹放在卧室的注意要点养护要得当。文竹摆放在卧室里，会受到各方面的限制，比如光照、通风之类的，可能会对文竹的生长产生不良的影响。光照不足，或者是通风不良，不仅会不利于文竹的生长，有时候还会滋生病害等，成为文竹健康的杀手。文竹在夜间可以移除卧室。晚上是文竹进行呼吸作用的时间，文竹会吸收氧气，放出二氧化碳，减低室内的含氧量。文竹在夜间进行呼吸作用对室内空气的改变影响不大，但是如果关窗睡觉的话，对睡眠是很不利的，卧室里的人可能会头晕气闷乏力。所以建议，夜间不要把植物放在卧室内，可以暂时移出来。

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Miss Chen

2017年12月13日

[图片]红掌，天南星科多年生常绿草本植物。茎节短；叶自基部生出，绿色，革质，全缘，长圆状心形或卵心形。叶柄细长，佛焰苞平出，卵心形，革质并有蜡质光泽，橙红色或猩红色；肉穗花序长5-7厘米，黄色，可常年开花不断。 [图片]红掌是否有毒红掌的花有轻微的毒性，只要不误食就不会有事，另外，红掌的毒性主要是存在于它的汁液里面，所以，在修剪红掌的时候一定要带上手套，并且在修剪之后洗手。红掌误食或者是误触之后怎么办如果误食红掌的话，可是非常难受的一件事情呢，嘴里又烧又痛，然后会肿胀起泡。嗓音变得嘶哑难听，吞咽也变得越发困难起来。多数症状会随着时间过去而减轻直到消失，如果想减轻痛苦，小编建议大家选择清凉的液体、止痛的药丸或者甘草类和亚麻仁的食物来进行吞服。如果皮肤直接接触红掌的汁液，皮肤上会有烧灼感，慢慢变得红肿，不过不用担心，慢慢会好的，日常护理中只要不接触它的汁液就没事。红掌的作用红掌能够吸收空气中对人体有害的苯、三氯乙烯，净化空气，再加上红掌的花期较长，盆栽的单花期更是能够达到4~6个月之久！是非常适合的室内观赏花卉。并且红掌也是非常合适的搭配室内陈设的一种植物，很容易制造出一种极佳的家居风格。红掌适合摆放在卧室吗如果是纯粹的观赏是可以放在卧室内的，和卧室内的家具相互映衬搭配，也可以为卧室添上一抹绿色，但是实际上，小编是不建议大家将植物摆放在卧室的，首先的一点，就是植物会在晚上的时候吸收氧气，排出二氧化碳。当然，如果花友不嫌弃麻烦的话，可以在晚上的时候将花卉从卧室中拿出来，白天的时候再搬回去。

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Miss Chen

2017年12月13日

[图片]吊兰养殖容易，适应性强，最为传统的居室垂挂植物之一。它叶片细长柔软，从叶腋中抽生出小植株，由盆沿向下垂，舒展散垂，似花朵，四季常绿。 [图片]吊兰有净化空气的作用吗吊兰的净化空气功能：吊兰不仅是居室内极佳的悬垂观叶植物，而且也是种良好的室内空气净化花卉。吊兰具有极强的吸收有毒气体的功能，一般房间养1一2盆吊兰，空气中有毒气体即可吸收殆尽，故吊兰又有“绿色净化器”之美称。安装一台空气净化器的话，可以说是还会消耗一些能源，但是实验证明，吊兰可以在24小时内将实验容器中的有害气体全部吸收净化。寝室里只要放上一盆吊兰，就可以在一天之内将室内电器、炉子、塑料制品、涂料等散发出来的一氧化碳、过氧化氮等有害气体吸收并输送到根部，再经过土壤里的微生物分解成无害物质，作为养料被吸收掉。因此在一间约10平方米的房间内，只要有一盆吊兰，就相当于安装了一台空气净化器，足以抵消有害气体带来的负面影响。吊兰可以放在卧室吗有的花友看了吊兰的空气净化作用，想要养殖一株吊兰在卧室。那么问题来了，作为植物，夜间也要进行呼吸作用，会和我们人类争抢氧气吗？吊兰可以放在卧室吗？其实，卧室是咱们休息的地方，只要你不摆放大于等于3盆的吊兰在卧室，小小的吊兰能消耗多少氧气呢！卧室的清新雅致能让人心情舒畅，绿意满满的卧室，让人的休息得到最佳的体验。吊兰的净化空气功能，让你的卧室空气清新。所以，吊兰是可以放在卧室的。但是要选择成株稍微小一些的，摆放盆数以1-2盆为宜。最好是放在窗台或者床的对面墙壁上。既消除了大家的疑虑，又满足了卧室清新空气的需求，还能让吊兰长得很好。一箭三雕的事儿，当然要赶紧做！家里有小孩能把吊兰放卧室吗现在的社会环境空气污染特别严重，在孩子的房间放一盆吊兰是很好的选择，既可以作为观赏，又可以净化空气，而且有研究表明，孩子多接触绿色植物有助于他们的思维扩展和良好的成长。但是要注意做好室内的通风，保持植株生长健康。如果小孩子感冒了的话，感冒阶段还是把吊兰移到别的房间为宜。感冒期间的孩子，鼻塞严重的话，影响他（她）的呼吸，夜晚把植物搬出去的话，有助于孩子的呼吸通畅。吊兰卧室摆放风水经过上面的介绍，花友们都知道，吊兰放在卧室，是非常有价值的，观赏和净化空气。那么你知道吊兰摆在卧室，其实还有点小讲究的吗？卧室一般要清净、安详、温馨。可用吊兰、百合、晚香玉、马蹄莲等适宜摆放在卧室的植物装饰。卧室中摆放吊兰，可令夫妻关系和睦，身心都可在温馨、安静中得到休息。将吊兰挂在床的斜对面最好，在床上坐着看书的时候，能看一眼墙上的花草，赏心悦目。，放松眼球。当然，卧室窗台向阳的，可以直接放在卧室窗台的左边，以左为尊嘛，能让吊兰长得很茁壮，为你的卧室增添情趣。

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Miss Chen

2017年12月13日

[图片]绿萝是阴性植物，喜散射光，较耐阴。它遇水即活，因顽强的生命力，被称为“生命之花”。蔓延下来的绿色枝叶，非常容易满足。室内养植时，不管是盆栽或是折几枝茎秆水培，都可以良好的生长。既可让其攀附于用棕扎成的圆柱上，也可培养成悬垂状置于书房、窗台，抑或直接盆栽摆放，是一种非常适合室内种植的优美花卉。 [图片]绿萝可不可以放在卧室有没有毒有人问，绿萝可不可以放在卧室里养，其实无非就是担心，绿萝是不是有毒，会不会对人的身体造成伤害。绿萝和滴水观音一样，都属于天南星科，这一科中的大多数植物都有毒性。其实，绿萝的汁液部分是有毒的，但是毒性较低，在家里养绿萝也是没问题的。一般的，只要不食用绿萝的汁液，并不会中毒。如果有时候不小心碰到绿萝的汁液，可能引起皮肤红肿发痒等症状，但是对身体并不会产生太大的影响。其实，养殖绿萝是利大于弊的，大家用不着“谈毒色变”，也不要认为其有毒，而不养殖。只要在日常生活中小心呵护，避免受到伤害，就可以了。晚上能放卧室养吗晚上，卧室如果开灯的话，绿萝就会进行光合作用和呼吸作用，一旦没有光，它就只能进行呼吸作用。基本上，一棵绿萝一晚上呼吸产生的二氧化碳是不会对室内空气成分有什么影响的，但是如果卧室里充满了绿色植物，并且光线总不是很好，二氧化碳的含量就会比较多了，你大概就会感觉不舒服了。所以说，在晚上，将绿萝放在卧室里是可以的，但是要注意，卧室里的植物不要太多了。绿萝在卧室里养护的位置选择窗台窗台，是绿萝的专利位置，小小的花盆，并不会占用太多的地方，还可以给窗台，营造一份奇特的景象，光是想想就觉得挺有意境的。另外，另外窗台上通风较好，阳光充足，对绿萝的生长最好了。桌柜上绿萝的体积较小，放在卧室的桌子上，柜子上都可以。梳理形状，让其藤蔓自然下垂，或者圈成圆环状，这样既充分利用了空间，净化空气，又起到了装饰作用，使整个卧室绿意盎然，情趣无限。新装修的卧室新装的房屋中，无论是地板、门窗，还是墙壁，都有大量的有害物质，而绿萝能同时净化空气中的苯、三氯乙烯和甲醛，一盆绿萝可以净化8~10平方米的空气，摆放在卧室中可以加快空气的净化，让人们提早住进卧室。绿萝在卧室里养护的注意事项光照绿萝在一年四季里都可以放在向阳处养护，将绿萝放在卧室的阳台上就可以满足这一点。但是要注意，夏季阳光强烈，要注意遮阳，防止强光直射，否则会导致新叶变小，叶色暗淡，同时易灼伤叶缘。温度绿萝是不耐寒的，在冬天，尤其要注意保温。要保持在15度以上，至少不能低于8度，否则会冻伤，使叶子发黄，脱落。一般，冬季有取暖条件的卧室，基本上可以满足绿萝的温度要求。空气湿度在卧室里，一般都会有一些取暖降温的电器，如空调。在有空调的卧室，应注意不要让空调风口直接对着绿萝的叶片吹，同时注意多向叶面及植株周围喷雾，以增加空气湿度。

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