Ceropegia rhynchantha
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Ceropegia rhynchantha is a species of the genus candlestick flowers ( Ceropegia ) in the subfamily of silk plants (Asclepiadoideae). It is native to West and East Africa.
description
Appearance and foliage leaf
Ceropegia rhynchantha grows as a twining and climbing, perennial herbaceous plant . The irregularly branched stem axis are smooth, strong and pink to light red in color.
The opposite arranged, little fleshy leaves are 1 to 1.7 cm long stalked. The simple, oval to elliptical, olive-green leaf blade is 2.5 to 4.5 cm long and 1.0 to 2.3 cm wide in the middle. The leaf veins can be pink to pinkish red. The leaf surface and the leaf margin are finely hairy.
Inflorescence and flower
The extraaxillary inflorescence contains a few more or less upright flowers. The inflorescence stem is about twice as long as the approximately 1 cm long peduncle. The inflorescence stem and peduncle are smooth.
The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope . The five hairless sepals, which are only fused at their base, are linear-lanceolate with a length of 2.75 mm. The five petals are fused to form a dumbbell-shaped crown that is up to 3 cm high and smooth on the outside. The crown is colored pink in the middle, covered with fine purple-red spots and the coloring runs out into purple-colored longitudinal stripes towards the base and the upper end. The heavily inflated base ("kettle") has a diameter of 8 mm. With the relatively wide corolla lobes , the lateral edges are strongly bent outwards and the tips fused. The lobes of the petals are colored light yellow on the inside, light yellow on the outside with rows of purple dots tapering towards the top. Above the point of attachment, the petal tips are drawn out into a stalk that is about half as long as the rest of the flower. The stem widens at the tip to an oval, lantern-like, pink-colored head. The inner secondary crown is 4 mm high and three times over the gynostegium . The poll lines are sub-square-elliptical with short translator arms.
Occurrence
The distribution area of the species extends from West Africa to Ethiopia, in particular North Cameroon (type locality), Burkina Faso and Niger as well as northern Nigeria . Friis et al. (1987) found the species relatively far away from the other occurrences in Ethiopia . Huber also mentions the occurrence in Guinea . The Global Biodiversity Information Facility also lists Mali , Benin and Togo under "occurrences" , based on evidence from the herbaria of the Musée National d'Histoire Naturelle in Paris, the Senckenberg Research Institute in Frankfurt, and the universities in Lomé and Abomey-Calavi.
The type locality is a rocky hill near Kokumi am Benue (North Cameroon), at an altitude of about 300 meters.
Taxonomy
The first description of Ceropegia rhynchantha was made in 1913 by Rudolf Schlechter in Botanical Yearbooks for Systematics, Plant History and Plant Geography , Volume 51, p. 155. The genus affiliation has not yet been questioned or regrouped into another genus.
supporting documents
Individual evidence
- ↑ Ceropegia all about Ceropegia - website of Alexander Lang. ( Memento of the original from January 29, 2007 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ^ J. Hutchinson: A Contribution to the Flora of Northern Nigeria. Plants Collected on the Bauchi Plateau by Mr. HV Lely. , In: Bulletin of Miscellaneous Information (Royal Gardens, Kew) , Number 10, London 1921, pp. 353-407. Online at JSTOR.
- ^ Ib Friis, Michael G. Gilbert and Kaj Vollesen: Additions to the Flora of Ethiopia, 2nd , In: Willdenowia , Volume 16 (2), Berlin 1987, pp. 531-564 Online at JSTOR.
- ^ Herbert FJ Huber: Revision of the genus Ceropegia. Memorias da Sociedade Broteriana, 12: 1-203, Coimbra, 1957 (summary description by C. rhynchantha p. 100).
- ↑ Global Biodiversity Information Facility .
- ^ Rudolf Schlechter : Asclepiadaceae africanae. , In: Botanical Yearbooks for Systematics, Plant History and Plant Geography , 51, pp. 129–155, Leipzig and Berlin 1913. First description scanned at botanicus.org - Ceropegia rhynchantha on p. 155.
- ↑ IPNI: Ceropegia rhynchantha
