Ceropegia cancellata
| Ceropegia cancellata | ||||||||||||
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| Ceropegia cancellata | ||||||||||||
| Reichenbach |
Ceropegia cancellata is a species of the subfamily of the silk plants (Asclepiadoideae).
description
Appearance and leaf
Ceropegia cancellata is a perennial herbaceous plant . Dark brown root tubers are formed as persistence organs, with a diameter of 5 to 10 cm, flattened-rounded to elongated. The winding, climbing shoot axes are annual and only very sparsely branched; they are up to 30 cm long. Usually only one shoot axis appears per tuber, rarely two shoot axes. The leaves are short stalked. The succulent leaf blades are up to 25 mm long and up to 20 mm wide, ovate, heart-shaped to lanceolate with a pointed upper end and they can be downy hairy. The top of the leaf is concave and the bottom is convex.
Inflorescence and flower
The stalked inflorescence is one to few flowers. The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope . They appear one after the other. The buds are pointed. The corolla is a total of 2.3 to 3.5 cm long (high). The five petals are fused in the basal two thirds to a slightly curved, smooth outside corolla tube ( sympetalie ). The basic color of the corolla tube is whitish-yellowish and brown-violet striped. The base of the corolla tube is spherical to ovoid ("Kronkessel"), 4 to 5 mm long and 4 mm in diameter. The inside of the "Kronkessel" is purple and bare. The "crown basin" decreases abruptly towards the actual crown tube to 1.3 to 2 mm in diameter, and widens to 4 to 5 mm in diameter towards the mouth of the flower. This part of the flowers is hairy on the inside. The petal lobes are linear with a length of 10 to 15 mm and the tips are fused. The lamina of the lobes are bent slightly outwards along the longitudinal axis and form an egg-shaped cage; they are bare on the inside and light yellow and brown-purple on the outside. The sessile to short-stalked, whitish corolla is fused in the basal bowl-shaped manner and measures 2.5 to 3 mm in diameter. The tips of the interstaminal corolla form egg-shaped pockets with a horizontal upper edge; laterally they are fused with the base of the staminal secondary crown. The tips of the staminal corolla are lanceolate to sickle-shaped and about 1.5 mm long. At first you stand upright, then lie together and then bend back sharply from the middle.
Fruit and seeds
Data on fruits and seeds are not yet available.
Similar species
Ceropegia cancellata is closely related to Ceropegia africana and the species around Ceropegia linearis .
distribution
Ceropegia cancellata occurs in the Eastern Cape Province of the South African Republic .
Botanical history and taxonomy
The first tubers of this type came to Europe before 1830. Count Johann Centurius von Hoffmannsegg cultivated them in his private botanical garden in Dresden. A tuber with shoot and flowers came to Ludwig Reichenbach for classification before 1830, who published it in Volume 3 of Iconographia Botanica Exotica on Plate 207. The holotype is kept in the Vienna Herbarium of the University of Vienna. His work was almost forgotten until Arthur Allman Bullock "rediscovered" it in 1956. In the meantime, several similar species had been described, including the more recent synonym Ceropegia assimilis NEBrown (1908).
supporting documents
literature
- Arthur Allman Bullock: Notes on African Asclepiadaceae VII. In: Kew Bulletin , Volume 10, 1955 [1956], pp. 611–626, London Online at JSTOR (pp. 625–626)
- Robert Allen Dyer: Ceropegia, Brachystelma and Riocreuxia in southern Africa. VIII, 242 pp., Rotterdam, Balkema, 1983 ISBN 90-6191-227-X (pp. 212-214)
- Herbert H. Huber: Revision of the genus Ceropegia. In: Memórias da Sociedade Broteriana , Volume 12, 1957, pp. 1–203, Coimbra (p. 129)
- Ulrich Meve: Ceropegia. In: Focke Albers, Ulrich Meve (Hrsg.): Succulents Lexicon Volume 3 Asclepiadaceae (silk plants). Pp. 61–107, Eugen Ulmer Verlag, Stuttgart 2002. ISBN 3-8001-3982-0 (p. 69)
Individual evidence
- ↑ Ludwig Reichenbach: Iconographia botanica exotica, sive Hortus botanicus, imagines plantarum imprimis extra Europam inventuram colligens, cum commentario succincto editus. Volume 3, plate 207, Friedrich Hofmeister, Leipzig 1830 online at Google Books