Ceropegia aridicola
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Ceropegia aridicola (Chin. 丽江 吊灯 花 li jiang diao deng hua) is a species of the subfamily of the silk plant family (Asclepiadoideae). It is based in the Chinese province of Yunnan .
features
Vegetative characteristics
Ceropegia is a perennial , herbaceous , upright plant with a bulbous rhizome. The ovoid to spherical tubers reach a diameter of about 3 cm. Only one, rarely two, upright shoots up to 50 cm high, which branch dichotomously, sprout from a tuber . They are bare, the basal parts without leaves. The slightly fleshy leaves have stems 4 to 6 mm long. The leaf blades are ovate to rounded triangular, 5 to 15 mm long and 3 to 10 mm wide. The top is covered with coarse hair; on the underside, the leaf veins are hairy down. The base is heart-shaped to approximately spike-shaped and pointed at the outer end. The edges are bent over, the "nerves" on the side are only hinted at.
Inflorescence and flowers
The inflorescence starts directly on the stem axis and has one to three flowers. The five-fold flowers are hermaphroditic and zygomorphic and have a double flower envelope. The flower stalks are 3 to 10 mm long and sparsely covered with downy hairs. The sepals are lanceolate to linear-lanceolate, approx. 2 mm long and 1 mm wide. The five petals are fused like a tube in the lower three quarters and form a 1 to 1.5 cm long (high), straight corolla. It is sparsely hairy on the outside and bald on the inside. The corolla tube is 7 to 10 mm long and at the base it is broadly egg-shaped to form a so-called "coronet". The 3 to 5 mm long corolla lobes are broadly ovate to diamond-shaped and fused approximately in the middle; they form a flat screen. The outer half of the petal lobes forms a central extension on this screen. The secondary crown is seated, i.e. H. without a stem and cup-shaped grown together and not hairy. The interstaminal corolla lobes are triangular, the staminal corolla lobes linear-spatulate or tongue-shaped. They are twice as long as the outer interstaminal minor corolla lobes.
Fruits and seeds
The paired, spindle-shaped follicles are up to 4.5 cm long. The seeds measure approx. 5 mm.
Similar species
The species is closely related to Ceropegia pusilla .
Geographical distribution and ecology
The species occurs in the Chinese province of Yunnan in the area from Lijiang to Shangri-La (formerly Zhongdian). It grows there in the grassland at 1,500 to 3,000 m above sea level. In the natural habitat it blooms in July to August. The fruits form in September and October.
Danger
The species is endangered. It is classified as “Endangered” by the International Union for Conservation of Nature and Natural Resources (IUCN).
Taxonomy
The taxon was first described by William Wright Smith in 1920. Synonyms are not yet known.
supporting documents
literature
- 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. 66)
- Li Ping-tao, Michael G. Gilbert, W. Douglas Stevens: Asclepiadaceae. Flora of China , Vol. 16, 1995, pp. 189-270. On-line
- Herbert H. Huber: Revision of the genus Ceropegia. In: Memórias da Sociedade Broteriana , Volume 12, 1957, pp. 1–203, Coimbra (description by C. aridicola, p. 53)
Individual evidence
- ↑ The IUCN Red List of Threatened Species - Ceropegia aridicola
- ^ William Wright Smith: Diagnoses Specierum novarum in herbario Horti Botanici Edinburghensis cognitarum. Lumi-D. In: Notes from the Royal Botanic Garden, Edinburgh , Volume 12, 1920, pp. 191-230, Edinburgh (p. 197) online at biodiversitylibrary.org