Orbea ciliata
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Orbea ciliata |
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| ( Thunb. ) LCLeach |
Orbea ciliata is a species of plant from the subfamily of the asclepiadoideae (Asclepiadoideae). The home is in South Africa in the Western Cape Province.
description
Vegetative characteristics
Orbea ciliata grows as a perennial succulent plant . The short, prostrate to upright stem succulent shoot axes are about 6 cm long / high and have a four-rib cross-section with a diameter of 1.5 cm. The pointed warts are up to 8 mm long and spread wide. The pointed, small leaves are hardened.
Generative characteristics
The inflorescence usually shows only one flower, rarely another bud forms at the base of the inflorescence stem. The flower stalk has a length of up to about 12 mm long with a diameter of 2 mm.
The hermaphroditic flowers are five-fold and with a diameter of 7 to 8 centimeters, radial symmetry and flat bowl-shaped spread. They have. The five sepals are 6 to 8 mm long, 3 mm wide and convex. The five petals are fused at the base, the central part is funnel-shaped. The corolla tube is flattened at the base and surrounded by an annulus (ring-like structure). The up to 8 mm high, quite massive and broad funnel-shaped annulus has a thickened, splayed, slightly bent edge. Occasionally very blunt tips are indicated. The short purple hair is short and stiff. The lanceolate petal lobes measure 3 to 3.2 cm in length and 1.4 to 1.7 cm in width. The outside smooth, inside more or less dense warty-papilla lobes are splayed out and the edges strongly curved outwards. The papillae are too purple at the tip. The edges are covered with white, about 3 mm long, simple or flattened clubbed hair ( trichomes ). These are vibratable (capable of oscillating). The crown is pale green and finely dotted purple-red on the outside, pale greenish-yellow on the inside and the funnel base purple-red.
The secondary crown has a height of about 1.5 cm and a diameter of about 4 mm and a blunt, pentagonal base. The interstaminal corolla lobes are pale yellow with some purple spots. They are deeply bowl-shaped, the tips measure 2 × 2 mm and are approximately square. They are splayed and soaring. The upper end is irregularly edged or occasionally has two teeth. The staminal side corolla lobes are leather-colored with fine purple points. They are shorter than the anthers . The anthers, which are upright at the base and bent further up, are pointed and convex on the back. The opening of the nectarium is relatively large, flat and teardrop-shaped. The pollinia measure 0.8 × 0.5 mm and are broad bean-shaped or crescent-shaped.
The number of chromosomes is 2n = 44.
Occurrence
Orbea ciliata occurs in the Western Cape Province ( South Africa ) south of the 31 ° latitude.
Systematics
This species was first published in 1794 by Carl Peter Thunberg as Stapelia ciliata . It was long placed in the genus Diplocyatha before Leslie Charles Leach (1909-1996) grouped it under the name Orbea ciliata in the genus Orbea .
supporting documents
literature
- Birgit Müller, Janine Kiel, Focke Albers and Ulrich Meve: Orbea . In: Focke Albers and Ulli Meve (eds.): Succulent lexicon Volume 3 Asclepiadaceae (silk plants) . Pp. 189-208, Ulmer, Stuttgart 2002, ISBN 978-3-8001-3982-8 . (Description of Orbea ciliata on p. 192)
Individual evidence
- ↑ Orbea ciliata at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ Carl Peter Thunberg: Prodromus Plantarum Capensium Quas, In Promontorio Bonae Spei Africes, Annis 1772 - 1775. Uppsala 1794 (p. 46 as Stapelia ciliata ) online at Botanicus.org
- ^ Leslie Charles Leach: A revision of Stapelia L. (Asclepiadaceae). Excelsa Taxonomic series, 3: 157 S., Johannesburg: Aloe books, 1985 ISBN 0620079762
Web links
- Martin Heigan's Stapeliads - "Hidden Treasures of the Desert"
- JStor Plant Science (as Diplocyatha ciliata )