Ceropegia hirsuta
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Ceropegia hirsuta Wight & Arn. |
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| Ceropegia hirsuta | ||||||||||||
| Wight & Arn. |
Ceropegia hirsuta is a species of the subfamily of the silk plant family (Asclepiadoideae).
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features
Vegetative characteristics
Ceropegia hirsuta is a perennial herbaceous plant whose shoots grow in twists. The tubers are flattened. The winding shoots are coarsely hairy. They measure about 3 mm in diameter. The opposite leaves are short stalked, the petioles 1 to 2 cm long. The elliptical to egg-shaped leaf blade measures 4 to 7 cm in length and 2 to 3.5 cm in width. The leaves are paper-thin and have downy hairs on the top and bottom, but especially on the edges. The base is rounded flat, the apex is pointed.
Inflorescence and flowers
The inflorescence arises from the leaf axils and has few flowers . The peduncle is up to 1 cm long and hairy. The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope. The flower stalks are 5 to 10 mm long and hairy downy. The five sepals, which are only fused at their base, are linear-lanceolate with a length of 5 to 6 mm. They are glabrous on the inside, hairy on the outside. The five petals are grown together to form a 4 to 5 cm high, slightly curved, smooth corolla on the outside. The flower tube is strongly inflated at the base (crown cup) and strongly constricted above the crown cup. The corolla tube gradually widens to the funnel-shaped flower opening. The crown cup takes up about a third to a quarter of the length, the tube about half. The crown cup measures about 5 to 8 mm in length, with a diameter of 6 to 9 mm, it has a wreath of hair in the middle area. The corolla is yellowish to greenish on the outside with purple spots or spots elongated to stripes in the upper part of the corolla tube. The funnel-shaped flower opening is hairy inside.
The yellowish corolla lobes are broadly ovate 7 to 8 mm long and 4 to 4.5 mm wide. The two leaves of the lamina are folded back along the midrib and form hair-covered keels on the inside. The respective outer edges of the corolla lobes are now on the outside, due to the complete bending back of the two leaves; they are also hairy. The apices of the petal lobes are fused and thus form an almost rounded, cage-like structure.
The secondary crown is flat, cup-shaped and sessile. The interstaminal (outer) hairy tips are almost rectangular, indented in the middle and laterally ending in triangular appendages. The tips of the staminal (or inner) secondary crown are linear-sub-crown, 2.5 mm long, sparsely hairy and erect. They incline towards the middle, the tips are bent outwards in the shape of a hook. There are five pollinaria. The yellowish pollinium is ovate and 0.4 mm long, with a triangular, translucent tip. The corpusculum (pollen carrier) is reddish brown and spatulate.
Fruits and seeds
The fruits stand upright.
Similar species
Ceropegia hirsuta is closely related to Ceropegia evansii McCann and Ceropegia fantastica Sedgw. But it differs from these species by the hook-shaped curved tips of the tips of the inner secondary crown.
Geographical distribution and ecology
The species has so far been described from Ubon Ratchathani , Pha Taem National Park , Thailand and from India (excluding the Himalaya region). It grows on sandy soils in dipterocarp forests at 250 to 300 m above sea level. The flowering period is from June to August (July to November).
Taxonomy
Ceropegia hirsuta was first described by Robert Wight and George Arnott Walker Arnott in 1834 . The holotype was collected in the Nilgiris district of Tamil Nadu and is kept in the Herbarium of the Royal Gardens in Kew (Eight Catalog no.150). Synonyms are: Ceropegia jacquemontiana Decne. (1844) = Ceropegia hirsuta var. Jacquemontiana (Decne.) Hook. fil. (1883), Ceropegia ophiocephala Dalziel (1850) = Ceropegia hirsuta var. Ophiocephala (Dalziel) Hook. (1883), Ceropegia hirsuta var. Stenophylla Hook. fil. (1883), and Ceropegia hispida Blatter & McCann (1931). Ceropegia hirsuta is generally considered a valid species.
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
- Tanucha Boonjaras and Obchant Thaithong: Ceropegia hirsuta (Asclepiadaceae), a new record for Thailand. Thai forest bulletin (Botany), 31: 1-6, 2003 PDF .
- Herbert FJ Huber : Revision of the genus Ceropegia. In: Memórias da Sociedade Broteriana. Volume 12, 1957, pp. 1–203, Coimbra (description by C. hirsura, p. 63)
Individual evidence
- ^ A b K. Sri Rama Murthy, R. Kondamudi1, M. Chandrasekhara Reddy, S. Karuppusamy, T. Pullaiah: Check-list and conservation strategies of the genus Ceropegia in India. International Journal of Biodiversity and Conservation, 4 (8): 304-315, 2012 doi : 10.5897 / IJBC12.011 PDF (ResearchGate)
- ^ Robert Wight: Contributions to the Botany of India. Parbury, Allen & Co., London, 1834 Online at Google Books , p. 30.
- ↑ 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, Ceropegia hirsuta p. 96.