Ceropegia evansii
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Ceropegia evansii is a species of the subfamily of the silk plant family (Asclepiadoideae).
description
Appearance and leaf
Ceropegia evansii is a perennial , herbaceous plant . A flattened, spherical root tuber with a diameter of 2 to 6 cm and a height of 1 to 3 cm is formed as a permanent organ . The winding, bare stem axes are up to 4 meters long.
The leaves are divided into a petiole and a leaf blade. The leaf stalk is up to 2 cm long. The almost bald, only very sparsely hairy leaf blades are ovate-lanceolate to ovate with a length of 7 to 14 cm and a width of 3 to 7 cm.
Inflorescence and flower
The rough hairy inflorescence stem is up to 4 cm long. The inflorescence is only a few flowers. The bare flower stalk is 1 to 1.2 cm long.
The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope . The corolla is 3 to 4 cm, the five petals are fused in the lower part to form a bare corolla tube ( sympetalie ). The basal part of the corolla tube is inflated into a spherical "coronet" with a diameter of up to 7 mm. It gradually turns into the actual 2 to 2.8 cm long corolla tube. The corolla tube narrows to about 3 mm in diameter and widens to 8 mm towards the mouth of the flower. The "crown kettle" is whitish-greenish, the actual crown tube is light gray-white, the lower half is purple on the inside. The egg-shaped petals are 8 to 12 cm long and 8 mm wide. They are completely folded back along the longitudinal axis and fused with the tips to form an elongated-elliptical, cage-like structure, slightly flattened at the top. The lower half of the “cage” is whitish, the upper half light yellow. The edges of the tips are a little darker, inside they are downy hairy. The sessile secondary crown is fused in a basal cup-shaped manner. The tips of the interstaminal , outer secondary crown are triangular-egg-shaped, incised in the middle and drawn out in triangular, hairy appendages. The upright corners of the staminal , inner secondary crown are linear.
Fruit and seeds
No information is available on the shape and size of the fruits and seeds.
Phenology
It blooms in its home area from July to September, and the fruits can be found from August to October (according to Ansari 1984 and Jagtap & Singh 1999 ).
Similar species
Ceropegia evansii is similar to Ceropegia media , but it is more densely hairy. The leaves are narrower and the flowers a little smaller. The corolla is cup-shaped with the tips of the corolla leaves bent almost at right angles.
distribution
The distribution area of Ceropegia evansii is limited to a small area in the southern Indian state, Maharashtra ( Ratnagiri District , Kolhapur District , Pune District ). It is a very rare species that was believed to be extinct but was found again in 2003.
Taxonomy and Phylogeny
The first description Ceropegia evansii was made in 1945 by Yale Mervin Charles McCann in Volume 45 of the Journal of the Bombay Natural History Society , 209. Herbert Huber described in 1957 a variety Ceropegia evansii var. Media that Ansari raised to the rank of Art 1984th
According to the phylogenetic analysis by Surveswaran et al. In 2009 Ceropegia evansii is the sister species of Ceropegia fantastica .
Endangerment, medical significance and artificial reproduction
Ceropegia evansii is used in traditional Ayurvedic medicine to produce remedies for diarrhea and dysentery. The tubers are rich in starch and edible. The species is endangered by overexploitation and habitat destruction. Conventional methods of propagation fail or are ineffective due to the rarity of natural pollinators, the low seed formation and the low germination capacity of the seeds. Propagation by cuttings is also difficult. In 2015 Indian scientists succeeded in propagating the species in vitro .
supporting documents
literature
- MY Ansari: Asclepiadaceae: Genus Ceropegia. In: Fascicles of Flora of India , Fascicle 16, 1984, pp. 1-34, Botanical Survey of India, Howrah (pp. 14-15)
- Herbert H. Huber: Revision of the genus Ceropegia. In: Memórias da Sociedade Broteriana , Volume 12, 1957, pp. 1–203, Coimbra (pp. 66–67)
- AP Jagtap, NP Singh: Asclepiadaceae and Periplocaceae. In: Fascicles of Flora of India , Fascicle 24, 1999, pp. 211-241, Botanical Survey of India, Kolkata (p. 222).
- 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. 75–76)
Individual evidence
- ↑ 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)
- ↑ P. Tetali, S. Tetali, P. Lakshminarasimhan, PV Prasanna, BG Kulkarni: Rediscovery of Ceropegia evansii McCann, Asclepiadaceae, from Maharashtra. In: Journal of the Bombay Natural History Society , Volume 100, No. 1, 2003, pp. 162-166.
- ^ Yale Mervin Charles McCann: In: Journal of the Bombay Natural History Society , Volume 45, 1945, p. 209.
- ↑ 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.
- ↑ Siddharthan Surveswaran, Mayur Y. Kamble, Shrirang R. Yadav and Mei Sun: Molecular phylogeny of Ceropegia (Asclepiadoideae, Apocynaceae) from Indian Western Ghats. In: Plant systematics and evolution , Volume 281, 2009, pp. 51-63: doi : 10.1007 / s00606-009-0182-8
- ↑ JJ Chavan, NB Gaikwad, PR Kshirsagar, SD Umdale, KV Bhat, GB Dixit & SR Yadav: Highly efficient in vitro proliferation and genetic stability analysis of micropropagated Ceropegia evansii by RAPD and ISSR markers: A critically endangered plant of Western Ghats. Plant Biosystems, 149 (2): 442-450, 2015 doi : 10.1080 / 11263504.2013.853700