Ceropegia ballyana
| Ceropegia ballyana | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Ceropegia ballyana | ||||||||||||
| Bullock |
Ceropegia ballyana is a species of the subfamily of the silk plant family (Asclepiadoideae). It only occurs in Kenya .
features
Appearance, stem axis and leaf
Ceropegia is a perennial herbaceous plant . There are fiber roots formed. The blue-green, smooth, winding stem axes are up to 3 meters long and are cylindrical with a diameter of 3 to 5 mm in cross section.
The leaves are divided into a petiole and a leaf blade. The 5 to 15 mm long petiole has a longitudinal furrow with a hairy edge on the upper side. With a length of 3 to 9 cm and a width of 2 to 6 cm, the slightly succulent leaf blades are ovate, elliptical to obovate and end blunt to pointed, sometimes they are also tapered to a point. The leaf surfaces are shiny dark to light green, the leaf veins protrude whitish.
Inflorescence and flower
The fleshy inflorescence stem is 3 to 10 cm long. The inflorescence is many-flowered. The flowers open one after the other, usually only one flower is open. The flower stalk is 1.5 to 3 cm long.
The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope . The five ciliate, 1 to 3 cm long sepals are lanceolate to narrow-lanceolate and spread straight. The corolla is 7 to 12 cm long. The five petals are fused in the lower part to form an externally smooth corolla tube ( sympetalie ). The corolla tube has a whitish-green to yellowish base color inside and out, which is speckled with red-brown dots or spots. The cylindrical, sometimes hinted at pentagonal "crown bowl" is 10 to 25 mm long and has a diameter of 9 to 16 mm. The corolla tube narrows abruptly to a diameter of 2 to 4 mm. It widens like a funnel towards the mouth of the corolla to 12 to 25 mm in diameter and is sparsely hairy on the inside. The 3 to 6 cm long corolla lobes are narrowly triangular at the base and thread-like elongated towards the end, the tips are fused and form a cage-like structure. The surfaces ("lamina") of the corolla lobes are curved outwards along the longitudinal axis and the edges are covered with white or purple hair. The inner half of the "lamina" is sparsely hairy and has a greenish-yellow basic color with a fine red dot pattern. The outer half of the tip is twisted in a spiral, green to dark purple in color and partially spotted. The short-stalked, bald adjoining crown is cupped at the base, measures 5 mm in diameter and is 5 mm high. The secondary crown is greenish in color with purple spots. The tips of the interstaminal , outer secondary crown are horizontally splayed to ascending and, at a length of about 2 mm, triangular with deeply incised ends that terminate in two pointed-triangular processes. The tips of the staminal inner secondary crown are linear with a length of about 3 mm, stand upright and incline over the gynostegium . The pollinia are broadly ovate and measure 0.4 × 0.28 mm.
Fruit and seed
The paired, smooth follicles are parallel; often one fruit is shorter than the other fruit. The blue-green follicle has a diameter of 0.8 to 1 cm and a length of 10 to 20 cm. The seeds are 10 to 15 mm long and 3 to 5 mm wide. The head of hair is 2 to 6 cm long.
Similar species
Ceropegia ballyana is closely related to Ceropegia albisepta , from which it differs in the size of the flowers and the length of the stem axes.
distribution
Ceropegia ballyana is found in the Matthews Range, Laikipia County , Rift Valley Province in Kenya .
Taxonomy
It was first described in 1951 under the name Ceropegia helicoides by Eileen Adelaide Bruce and Peter René Oscar Bally . However, this spelling is to be considered a variant of the spelling helicoidea . Ceropegia helicoides is therefore a younger homonym of Ceropegia helicoidea Choux (published 1925) and thus an illegitimate name. Arthur Allman Bullock therefore replaced it with the name Ceropegia ballyana . The specific epithet ballyana honors the botanist and co-author of the first description Peter René Oscar Bally.
supporting documents
literature
- Henk J. Beentje (Eds.), David Goyder, Timothy Harris, Patrick Siro Masinde, Ulrich Meve, Johan Venter: Flora of Tropical East Africa, Apocynaceae (Part 2). Royal Botanic Gardens, Kew, 2012, ISBN 978-1-84246-396-3 , pp. 115-530 ( Ceropegia ballyana p. 274).
- 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. 67)
- Patrick Siro Masinde, Focke Albers: The East African Ceropegia ballyana Bullock (Asclepiadaceae-Stapelieae). In: Kakteen und other Sukkulenten , Volume 50, Issue 12, 1999, pp. 303-308.
Individual evidence
- ↑ Eileen Adelaide. Bruce, Peter René Oscar Bally: Ceropegia helicoides Bruce et Bally, sp. nov. In: Kew Bulletin , Volume 1950, No. 3, p. 371.
- ↑ Arthur Allman Bullock: Notes on African Asclepiadaceae: VII. In: Kew Bulletin , Volume 10, No. 4, 1955, pp. 611-626.