Brachystelma oianthum
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Brachystelma oianthum , illustration |
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Brachystelma oianthum is a species of plant from the subfamily of the asclepiadoideae (Asclepiadoideae). It is only native to South Africa and is characterized by its relatively large, bell-shaped flowers.
description
Vegetative characteristics
Brachystelma oianthum is a perennial herbaceous plant . This geophyte forms a spherical root flattened on the upper side with a diameter of about 5 cm, as a permanent organ. It forms one or two upright or prostrate, annual, downy hairy stem axes with a height / length of 20 to 80 cm. The leaves are short stalked. The simple leaf blade is 10 to 60 mm long and 5 to 15 mm wide and shaped like an egg or lanceolate with a pointed upper end.
Inflorescence and flowers
The sessile inflorescence is single-flowered with an approximately 5 mm long, downy hairy pedicel. The five narrow triangular sepals are 5 mm long. The corolla, which is papillous and very hairy on the inside, is yellowish in color with a few purple spots on the outside, while on the inside it has many purple spots. The oval to bell-shaped corolla tube with a length of 15 to 25 mm has only short, triangular corolla lobes with a length of 3 mm, which are covered at the edge with movable, club-like, purple or pink hair. The sessile secondary crown is 2.5 mm high and about 3 mm in diameter at the base. The interstaminal corolla lobes are almost square in outline, arched in the shape of a pocket and provided with an incision on the upper edge; there is a hairline inside. They are fused basally with the staminal corolla lobes. The tongue-shaped corolla lobes with a length of only about 1 mm lie on the anthers . The pollinia are approximately pear-shaped.
Similar species
Brachystelma oianthum is closely related to Brachystelma decipiens .
distribution
Brachystelma oianthum occurs in the South African provinces of Northwest , Mpumalanga and Free State .
Taxonomy
Brachystelma oianthum was first described by Rudolf Schlechter in 1895 . The two specimens available to him came from Mooifontein ( Ditsobotla ), Northwest Province and the Elandspruit Mountains (Prov. Mpumalanga) at altitudes of "5500 to 6000 feet" (= 1676 to 1828 meters). An illustration was published in Cutis's Botanical Magazine .
swell
literature
- Ulrich Meve: Brachystelma . In: Focke Albers, Ulli Meve (Ed.): Succulent Lexicon Volume 3 Asclepiadaceae (silk plants). Pp. 17–43, Eugen Ulmer Verlag, Stuttgart 2002. ISBN 3-8001-3982-0
- Nicholas Edward Brown: Asclepiadaceae. In: William T. Thiselton-Dyer (Ed.): Flora Capensis: being a systematic description of the plants of the Cape Colony, Caffraria and Port Natal (and neighboring territories). Volume 4, Sect.1 Vaccinaceae to Gentianeae. London, Reeve, 1905-09 Scanned at Botanicus.org (description of Brachystelma oianthum on p. 838)
Individual evidence
- ^ Rudolf Schlechter: Contributions to the knowledge of South African Asclepiadaceen. IV. List of the Asclepiadaceans that I collected on my last trip through Natal and Transvaal. Botanical yearbooks for systematics, plant history and plant geography, 20 (supplement no. 51): 7-56, Berlin 1895 online at Botanicus.org (description of Brachystelma oianthum on p. 53)
- ↑ Curtis's Botanical Magazine, vol.142 (4.ser.), Vol.12, plate 8670 + 2 pages description (online at biodiversitylibrary.org)
