Ceropegia papillata
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Ceropegia papillata is a species of the subfamily of the silk plant family (Asclepiadoideae).
description
Appearance and leaf
Ceropegia papillata is a perennial herbaceous plant. A flattened, spherical root tuber with a cracked bark with a diameter of 30 mm and a height of 10 mm is formed as a permanent organ . The sprouting, finely downy hairy and hardly branched shoot axes are up to 1 meter (in exceptional cases up to 3 meters) long and twisting with a diameter of 1.5 mm.
The leaves are divided into a petiole and a leaf blade. The leaf stalk is 12 to 24 mm long (in exceptions also up to 50 mm). The leaf blades are egg-shaped with a length of 2.5 to 6.5 cm and a width of 1.3 to 3 cm with a blunt to long pointed upper end. The base of the spade is simple, it can occasionally be heart-shaped, arrow-shaped to three-lobed. In young plants, the basal tips are rounded and separated by a small sinus. In older plants, the tips overlap and enclose a diamond-shaped sinus. The top and bottom of the leaf is thinly to densely hairy and the leaf margins are ciliate.
Inflorescence and flower
The inflorescence is sessile to very short stalked. The shoot axes carry dense clusters of 10 to 20 flowers at many nodes. Usually several flowers are open at the same time. The fluffy hairy bracts are linear-needle-shaped with a length of 4 to 8 mm. The flower stalks are 8 to 12 mm long.
The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope . The five coarse hairy sepals are narrowly triangular with a length of 3 to 5 mm and a width of about 0.5 mm. The corolla is slightly curved and 1.6 to 2.5 cm long. The five petals are fused into an externally bare, 11 to 20 mm long corolla tube ( sympetalie ). The lower third of the corolla tube, also known as the “corolla”, is pear-shaped with a length of about 4 mm and a diameter of about 5 mm. Inside, there are strong papillae along the veins . The "Kronkessel" is whitish-green on the outside. Above the "crown basin", the diameter of the corolla tube decreases quite abruptly to 1.5 mm, only to expand again to 3.5 to 5 mm at the mouth of the flower. The corolla tube is bare inside, tinged with purple on the outside, dark brown towards the opening of the flower. Inside the opening is provided with dark green or black veins on a white background. The petal lobes are linear-spatulate with a length of 4 to 7 mm and a width of about 2 mm with a triangular base. The lamina of the lobes are bent back along the longitudinal axis, at the base only the edges are bent back, and the ends are fused. The tips thus form a spherical, cage-like structure. The upper half and the edges of the lower half are blackish green. In the lower half, the tips are white inside with a central dark green line, the keel is hairy here. The whitish, translucent secondary crown is stalked, the base is fused in a cup-shaped manner and is 2 mm long and 2 mm wide. The tips of the interstaminal , outer secondary crown are triangular to rectangular, 1 to 1.8 mm long, at the base 0.5 mm wide and at the upper edge incised at an obtuse angle or bifid (forming three teeth, the teeth are purple). The tips stand upright or are slightly curved inwards. The tips of the staminal, inner secondary crown are linear-spatulate, 1.5 mm long and 0.3 mm wide. They stand upright and bend together at the outer end, often bent back slightly at the outer end. They are purple in color and fine or clearly papillary. The stamens are almost square and protrude beyond the rounded stylus head. The pale yellow pollinia are egg-shaped and measure 0.25 to 0.28 mm × 0.12 to 0.16 mm. The corpusculum is linear, dark brown and measures 0.12 to 0.16 mm × 0.04 mm.
Fruit and seeds
The paired follicles are at an acute angle to each other. The follicles are slender spindle-shaped with a length of 7.5 to 12 cm and a diameter of 2 to 3 mm. The seeds are 5 to 6 mm long and 2 to 2.5 mm wide. The head of hair is 10 to 15 mm long.
Similar species
Ceropegia papillata is closely related to Ceropegia claviloba , Ceropegia paricyma, and Ceropegia cordiloba . Ceropegia meyeri-johannis is probably also closely related. Most of the specimens identified by the authors as Ceropegia meyeri-johannis var. Verdickii actually belong to Ceropegia papillata .
Occurrence
Ceropegia papillata occurs in Tanzania in the Rungwe District, Ufipa District, Iringa District and the Songea District. The further distribution area extends from the Democratic Republic of the Congo , Zambia to Malawi . Ceropegia papillata thrives in Brachystegia forests and gallery forests at altitudes of 400 to 2220 meters.
Taxonomy
The first description of Ceropegia papillata in 1898 by Nicholas Edward Brown in the Bulletin of Miscellaneous Information Kew 1898 , p 308. Herbert Huber in his revision of the genus Ceropegia evaluated another taxon , the Werder man had set up in 1939, Ceropegia cordiloba the variety of papillata Ceropegia from . Later authors followed this assessment until Patrick Siro Masinde in Goyder et al. 2012 reversed the devaluation and treated Ceropegia cordiloba again as an independent species.
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 papillata pp. 234-235).
- 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. 93)
- Herbert H. Huber: Revision of the genus Ceropegia. In: Memórias da Sociedade Broteriana , Volume 12, 1957, pp. 1–203, Coimbra (description of Ceropegia papillata, p. 152)
Individual evidence
- ↑ Erich Werdermann: Revision of the East African species of the genus Ceropegia. In: Botanical Yearbooks for Systematics, Plant History and Plant Geography , Volume 70, 1939, pp. 189–232, Leipzig (pp. 219–220)
Web links
- Ceropegia papillata NEBr. - Website of Alexander Lang (leaves and flowers)