Asclepias lanceolata
Asclepias lanceolata
Asclepias lanceolata is a species of the genus milkweed ( Asclepias ) from the subfamily of milkweed plants ( Asclepiadoideae ).
- 4.1 Literature
- 4.2 Notes and references
Features
Vegetative characteristics
Asclepias lanceolata is a perennial, herbaceous, upright growing plant with a rhizome consisting of tuberous roots. The year shoots are slender and unbranched branches to little, from 50 to 120 cm (150 cm ) tall, and bald. They die in the fall off completely and drive in late spring from the rootstock again. The leaves are opposite and sessile stalked up short. Are formed only about three to six pairs of leaves. The internodes are accordingly relatively long time (approx. 15 to 25 cm). The leaf blades are linear - lanceolate and narrowly pointed at the outer end, the base acute to obtuse. They are 7-25 cm long, 0.5 to 1.7 cm wide, firmly membranous and bare. The underside is coated with a light gray - bluish or whitish waxy substance.
Inflorescence and flowers
The terminal, few-flowered (average of 7 flowers) and stalked inflorescences are available individually or in pairs (up to three). The stems are 1.5 to 7.5 cm long. The moderately large and stalked flowers are hermaphrodite and zygomorphic fünfzählig; they have a double perianth. The stems are 1 to 2 cm long. The sepals are triangular- lanceolate and 2.5 to 4 mm long. The corolla is wheel-shaped with strongly recurved, 9-10 mm long, yellow-orange to deep red petals. The single-row, yellow, orange or reddish corona is stalked, the cylindrical stem about 2 mm long and 1.5 mm wide. The tip of the staminal corona are in outline broad -oblong, 5-6 mm long and rounded at the outer end. The horn-shaped secondary projections on the inside of the ears are needle -shaped and shorter than the petals; they tend to be composed via the stylus head. The stylus head is narrow - conical, about 3 mm long and 2.5 mm wide. The flowers produce abundant nectar.
Fruit and seeds
The paired follicles stand upright on the U-bent stems. They are small spindle-shaped, 8 to 10 cm long and about 1 cm thick. The surface is smooth and bare. The seeds are broad ovoid, about 1 cm long with an approximately 3.5 cm long hair.
Similar Species
Asclepias lanceolata is closely related to Asclepias rubra. Despite similar areas of distribution, habitats and flowering times so far no hybrids was observed.
Geographical distribution and ecology
The distribution area extends across the southeastern United States (Alabama, Delaware, Florida, Georgia, Louisiana, Mississippi, New Jersey, North Carolina, South Carolina, Texas and Virginia). It grows in brackish marshes and freshwater marshes, wet pine forests and clearings, and blooms from (February) May to August. The flowers are 5-7 open for days before they wither. Main pollinators are butterflies, including the first place Danaus gilippus, followed by various Swallowtail species ( Papilio sp.).
Taxonomy and systematics
The taxon was first described by Thomas Walter 1788. The Plant List accepted as a valid taxon Art
There are a number of synonyms:
- Asclepias paupercula Michx. (1803 )
- Asclepias lanceolata var paupercula ( Michx. ) Fernald (1935 ).
- Asclepias lanceolata var paupercula f flaviflora Fernald (1943 )