Duvalia caespitosa
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Duvalia caespitosa |
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| ( Masson ) Haw. |
Duvalia caespitosa is a species of the subfamily of the silk plants (Asclepiadoideae).
features
The stem succulent shoots reach a height of up to 10 cm and a thickness of up to 2.2 cm. They are oval to cylindrical, square to pentagonal in cross section and dark green. The leaflets are inconspicuous (about 2 mm).
The 1 to 2.5 cm long peduncle with one or more flowers arises near the base of the shoot. The flower smells strongly of feces. The five sepals measure 2 to 6 mm in length. The corolla has a diameter of 2 to 3.5 cm. It is red-brown, chocolate-brown, brown-violet to purple-colored, rarely light brown. The (free) corolla lobes are up to 15 mm long and 9 mm wide at the base. The lamina is completely turned over, the edges are hairy at the base or along the entire length. The hair is simple (about 0.4 mm long) or club-like (up to 2.6 mm long). The annulus is rounded to rounded pentagonal, somewhat constricted at the base. It measures 7 to 11 mm in diameter and is 2 to 5 mm high. It is often spotted and usually covered with papillae or hair. The secondary crown, which is 5 to 7 mm in diameter, is yellow to red-brown in color with a round to rounded pentagonal disc. The staminal coronary lobes are rounded, square or rectangular (1.5 to 2.2 mm × 1.5 to 2.5 mm).
The follicles are spindle-shaped and 6 to 17 inches long. The seeds measure 4 to 6 mm in length and 3 mm in width.
The number of chromosomes is 2n = 44.
Occurrence
Duvalia caespitosa occurs in the provinces of the North Cape , Western Cape , Eastern Cape and Free State of the Republic of South Africa . So it is a floral element of the Capensis .
Taxonomy
There are currently two varieties of Duvalia caespitosa :
- Duvalia caespitosa (Masson) Haw. var. caespitosa
- Duvalia caespitosa var. Compacta (Haworth) Meve : The shoots are a little more compact, the inflorescences set near the tip of the shoots, the corolla is on average a bit smaller. Duvalia caespitosa var. Compacta is restricted to the winter rain area of the Western Cape Province.
literature
- Focke Albers and Ulli Meve (eds.): Succulent lexicon Volume 3 Asclepiadaceae (silk plants) . Ulmer, Stuttgart 2002, ISBN 978-3-8001-3982-8 , pp. 125-126.
Individual evidence
- ↑ Duvalia caespitosa at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
