Asclepias humistrata
Asclepias humistrata
Asclepias humistrata is a plant of the genus milkweed ( Asclepias ) from the subfamily of milkweed plants ( Asclepiadoideae ).
- 4.1 Literature
- 4.2 Notes and references
Features
Vegetative characteristics
Asclepias humistrata is a perennial, herbaceous, erect or prostrate plant with a deep-seated, tight - spindeligem rootstock. The simple instincts are stiff, 20 to 40 cm ( 90 cm ) tall, gray-green and hairless. The opposite leaves are sessile. The leaf blades are very broad - ovate and 5-12 cm long and 3-10 cm wide. The outer end is tipped acuminate to obtuse wide, base deeply cordate - clasping and. They are easy succulent and glabrous, the veins stand out clearly through their usually reddish or purple color of the gray-green color of the leaves from.
Inflorescence and flowers
The little - to many-flowered, compact, stalked inflorescences are terminal and lateral spring usually the uppermost nodes present. The slender inflorescence stems are 4-6 cm long. The fivefold hermaphrodite flowers are zygomorphic, and have a double perianth. The flower stalks are 1-3 cm long. The bloom is rather small with lanceolate, 2.5 to 3 mm long sepals. The corolla is wheel-shaped with strongly recurved, pink - purple, 5-6 mm long Kronblattzipfeln. The single-row, pale cream to purple corona is short-stalked, the stem is wide verkehrtkonisch and measures approximately 1 mm in length and 1.5 to 2 mm in width. The hood -shaped lobes are broad ovoid and about 3 mm long. The horn-shaped secondary appendage on the inside of the ears is usually at the lobes. It is crescent-shaped, rather than the tip küzer and curved inwardly. Of 1.5 to 2 mm long stylus head has a conical shape with a flattened top.
Fruit and seeds
The narrow - spindle-shaped, paired follicles stand upright and are 9-10 cm long and 1.5 to 2 cm thick. The surface is smooth and bare. The seeds are broad ovoid, about 8 mm long and have a white, 3.1 to 3.5 cm long hair.
Geographical distribution and (syn ) Ecology
The distribution area which is located primarily in the southeastern United States (Alabama, Florida, Georgia, Louisiana, Mississippi, North Carolina and South Carolina). It grows on sand dunes, dry airy oak forests and sparse pine forest on well-drained, sandy soils. It flowers from April to July. She is a food plant for the caterpillars of the monarch butterfly (Danaus plexippus) and Danaus gilippus and the tiger moth species Cycnia tenera and Cycnia inopinata.
Taxonomy and systematics
The taxon was first described by Thomas Walter 1788. André Michaux described them incorrectly under the name of Asclepias amplexicaulis. The Plant List accepted as a valid taxon Art Asclepias humistrata hybridizes occasionally with Asclepias amplexicaulis.