Ceropegia claviloba
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| Ceropegia claviloba | ||||||||||||
| Werderm. |
Ceropegia claviloba is a species of the subfamily of the silk plant family (Asclepiadoideae).
description
Appearance and leaf
Ceropegia is a perennial herbaceous plant . Small, flattened root tuber with a diameter of 12 to 32 mm and a height of 10 to 24 mm is formed as a permanent organ . The annually new sprouting, finely downy hairy and hardly branched shoot axes are with a diameter of 1.5 mm up to 1.5 meters long (high) and winding. The leaves are divided into a petiole and a leaf blade. The petiole is 30 to 40 mm long. The fleshy to slightly succulent, fluffy hairy leaf blades are 2.5 to 4.5 (in rare cases up to 7 cm) in length and 2 to 3 cm in width and are heart-shaped, lanceolate and pointed. The ciliate leaf margins are often serrated or indented at the base of the stem axes, otherwise they have entire margins.
Inflorescence and flower
The inflorescence stem is 5 to 30 mm long. The inflorescence contains one to ten flowers that open one after the other. The flower stalk is 3 to 8 mm long and usually bare.
The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope . The five mostly coarse hairy, rarely bald sepals are subpulate with a length of 2 to 4 mm. The corolla is only 10 to 18 mm long. In the lower part, the five petals are fused to form a slender, hairless corolla tube ( sympetalie ). The corolla tube is curved and whitish-green on the outside. Basally it is inflated to a spherical "crown basin" (diameter 4 to 5 mm) and gradually merges into the actual crown tube. This has a minimum diameter of 1.5 to 2 mm and widens towards the mouth of the flower to 3 to 4 mm in diameter. The broad spatulate, at the base triangular petal lobes are 4 to 7 long and 3 mm wide. The lamina of the lobes are bent outwards along the longitudinal axis, the ends are fused; they thus form a spherical, cage-like structure. They are velvety purple or greenish colored inside and hairy; outside they are greenish. The sessile, whitish, translucent secondary crown is 3 mm long and 2.5 mm wide at the base and is cupped or cup-shaped. The approximately 1 mm long tips of the interstaminal outer secondary crown are pocket-shaped and horizontal, oval to rectangular in outline and then upright. They are incised in the middle at the upper end and are bald, papillous or hairy. The papillary tips of the staminal inner secondary crown are 1.5 to 2 mm long, cylindrical-spatula-shaped and straight-upright. The pollinia are elliptical with a pointed top. They are 220 to 250 µm long and 14 µm wide. The corpusculum is bright orange, linear-inverted ovoid and measures 110 µm × 50 µm.
Fruit and seeds
The paired follicles are at an acute angle to each other. The follicles are narrowly spindle-shaped with a length of 5.5 to 12 cm and have a diameter of 2 to 3 mm in the middle. The seeds measure 6 to 7 mm × 3 mm and are black-brown with a brown border. The head of hair is up to 12 mm long.
Similar species
Ceropegia claviloba is closely related to Ceropegia papillata and Ceropegia muzingana .
Occurrence
The distribution area of Ceropegia claviloba extends from Tanzania through the Democratic Republic of the Congo , Malawi , Zambia to Zimbabwe . It grows there in sparse forests along rivers at altitudes of 1000 to 2100 meters.
Taxonomy
The first description of Ceropegia claviloba was made in 1939 by Erich Werdermann in revision of the East African species of the genus Ceropegia. in the journal Botanical Yearbooks for Systematics, Plant History and Plant Geography , 70, p. 221. The neotype comes from Engwe, Mutare in the east of Zimbabwe from an altitude of 1830 meters. François Malaisse described this species in 1984 under Ceropegia floribunda NEBr.
supporting documents
literature
- Henk J. Beentje (Eds.), David Goyder, Timothy Harris, 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 claviloba, pp. 236/7).
- Herbert Franz Josef Huber: Revision of the genus Ceropegia. In: Memórias da Sociedade Broteriana , Volume 12, 1957, pp. 1–203, Coimbra (p. 154)
- 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 (pp. 70–71)
Individual evidence
- ↑ Erich Werdermann: Revision of the East African species of the genus Ceropegia. In: Botanical Yearbooks for Systematics, Plant History and Plant Geography , 70, 1939, pp. 189–232, Leipzig (p. 221)
- ^ François Malaisse: Recherches sur les Asclepiadaceae du Shaba (Zaïre). I. Nouvelles Observations sur le genre Ceropegia L. In: Bulletin du Jardin botanique national de Belgique , Volume 54, Number 1/2, 1984, pp. 213-234, Brussels (p. 226).
- ↑ Ulrich Meve: Ceropegia Checklist. A guide to alternative names used in recent Ceropegia classification. In: Dennis de Kock, Ulrich Meve: A Checklist of Brachystelma, Ceropegia and the genera of the Stapeliads. International Asclepiad Society 2007, pp. 83-113.