Asclepias variegata
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Asclepias variegata |
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Asclepias variegata is a species of silk plants ( Asclepias ) from the subfamily of the silk plants (Asclepiadoideae).
features
Vegetative characteristics
Asclepias variegata is a perennial , upright plant with a fleshy, spindle-shaped rhizome. The slender, herbaceous shoots are unbranched and 30 to 120 cm high. They are inconspicuously fluffy and hairy, the hairs are arranged in lines that run down from the nodes . The opposite leaves are stalked, the stems are 1 to 2 cm long. The leaf blades are broadly ovate with an obtuse to acuminate outer end. The base is broadly obtuse to rounded. They measure 8 to 15 cm in length and 4 to 8 cm in width and are dark green. The tops are bald, the undersides waxy and very sparsely hairy.
Inflorescence and flowers
The stalked inflorescences are usually solitary and are terminal. Occasionally a plant forms several inflorescences, which arise laterally at the uppermost nodes . In the spherical to hemispherical inflorescences the approximately 15 to 35 flowers are arranged very densely. The stems are rather slender and 1 to 7 cm long. The five-fold, rather large, zygomorphic flowers are hermaphroditic and have a double flower envelope. The flower stalks are 1 to 2 cm long. The sepals are egg-shaped and about 3 mm long. The corolla is wheel-shaped, the white petals are 7 to 8 mm long. The single-row, staminal corolla has a short stalk, the obverse-conical, 1.5 mm long and 2 to 2.5 mm wide stalk is purple in color. The white tips of the secondary crown are hooded, conduplicate, and puffed out. They are broad-obverse-shaped and about 2.5 mm long. The secondary process attaches itself to the base on the inside; it is much shorter than the tip (of the secondary crown). It is sickle-shaped and sharply curved inward. The stylus head is about 2 mm long and 3 mm wide.
Fruits and seeds
The follicles stand upright on U-shaped curved stems. They are narrow-spindle-shaped, 10 to 15 cm long and 1.5 to 2 cm thick. The outer end tapers to a point. The outside is finely hairy and bluish-gray. The seeds are elliptical and about 5 mm long. The white head of hair is 2.5 to 4.5 cm long.
Geographical distribution and ecology
The species occurs in the US states of Alabama , Arkansas , Connecticut , Delaware , Florida , Georgia , Illinois , Indiana , Kansas , Kentucky , Louisiana , Maryland , Mississippi , Missouri , Nebraska , New Jersey , New York , North Carolina , Ohio , Oklahoma , Pennsylvania , South Carolina , Tennessee , Texas , Virginia , Washington, DC and West Virginia and southern Quebec ( Canada ) before.
It grows there in dense bushes or sparse forests, usually in sandy or stony soil. It blooms from May to July; the flowers are fragrant. The propagation can also take place vegetatively to a lesser extent. Side shoots and their separation from the mother plant can lead to small colonies of clonal plants.
Taxonomy and systematics
The taxon was first described by Carl von Linné in 1753 . Another early description was made by Thomas Walter . Younger synonyms are:
- Asclepias hybridus Michx. (1803)
- Asclepias variegata a major Hook. (1837)
- Biventraria variegata (L.) Small (1933)
supporting documents
literature
- Robert E. Woodson, Jr .: The North American Species of Asclepias L. In: Annals of the Missouri Botanical Garden , Vol. 41, No. 1, 1954, pp. 1-211, St. Louis, Mo. URL (pp. 116–118)
Individual evidence
- ↑ United States Department of Agriculture - Plants Profile: Asclepias variegata L. redring milkweed
- ↑ Carl von Linné: Species plantarum: exhibentes plantas rite cognitas, ad genera relatas, cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas ... Holmiae, Impensis Laurentii Salvii, 1753. [1]
- ^ Thomas Walter, J. Frazer, J. Wenman: Flora Caroliniana, secundum Systema vegetabilium Linnæi digesta, characteres essentiales naturalesve et differentias veras exhibens; cum emendationibus numerosis, descriptionum antea evulgatarum adumbrationes stirpium plus mille continens, necnon generibus novis non paucis, speciebus plurimis novisq. ornata. Londini: Sumptibus J. Fraser Prostant venales apud J. Wenman, in Vico vulgo dicto Fleet-street, 1788. Online at www.biodiversitylibrary.org (p. 104/5)
- ^ André (Andreas) Michaux: Flora boreali-americana, sistens caracteres plantarum quas in America septentrionali collegit et detexit. Parisiis et Argentorati, apud fratres Levrault, anno XI - 1803. Online at www.biodiversitylibrary.org (p. 1157)
- ↑ William Jackson Hooker: Flora boreali-americana, or, the botany of the northern parts of British America : compiled principally from the plants collected by Dr. Richardson; Mr. Drummond on the late northern expeditions, under command of Captain Sir John Franklin, RN To which are added (by permission of the Horticultural society of London,) those of Mr. Douglas, from north-west America, and of other naturalists. Volume 2, London, HG Bohn 1834-1840. Online at www.biodiversitylibrary.org (p. 52: published July 1837 according to IPNI )
- ^ John K. Small: Manual of the southeastern flora. 1554 S., New York, 1933 (p. 1072).
