Ceropegia media
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Ceropegia media , inflorescence |
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| ( H.Huber ) Ansari |
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Ceropegia media is a species of the subfamily of the silk plant family (Asclepiadoideae). The species is endemic to the Western Ghats in the state of Maharashtra in India.
features
Vegetative characteristics
Ceropegia is a perennial herbaceous plant with a tuber 1 to 4 centimeters in diameter. The delicate, green or purple-red colored, unbranched shoots are creeping to twisting and bare. They are a maximum of about 3 meters long. The opposite leaves are stalked, the petioles 5 to 24 mm long. The leaf blades are linear-lanceolate to ovate-lanceolate, 5 to 15 cm long, 1 to 5 cm wide, their apex pointed to pointed. The leaf margin and the median nerve on the underside are hairy.
Inflorescence and flowers
The inflorescence is a leaf axillary, few-flowered cymes , with three to eight individual flowers that open one after the other. The inflorescence stalk is 1 to 2.8 cm long and hairy. The flower stalk is about 5 mm long and also hairy. The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope. They are fused into a tube in the lower two thirds of the length. The calyx lobes are about 5 millimeters long and hairy. The bald corolla is 2.1 to 2.5 cm long and stands upright. It is cream-colored in the lower half, occasionally with individual purple longitudinal stripes, in the upper half increasingly purple. In the lower part it consists of a flower tube, which widens abruptly at its base like a cauldron, the corolla tube is 1.4 to 1.8 cm long and slightly curved. Above the basal enlargement, it is cylindrical, expanding outwards in a funnel shape. The corolla-tube measures about 3 mm in diameter near the corolla, and widens like a funnel towards the flower opening to about 7 mm in diameter. The egg-shaped petal lobes are 8 mm long and 2.5 mm wide. They are completely folded back along the midrib and are fused apically. They are whitish-cream-colored on the inside and turn purple to reddish-brown towards the tip; and completely bare inside and out. The secondary crown is stalked and fused cup-shaped at the base. The tips of the interstaminal (outer) secondary crown have completely merged into the cup-shaped structure. They are pocket-shaped, median notched, and covered with eyelashes. The tips of the staminal (inner) secondary crown only started out basally in the cup-shaped structure. They are linear and bent inwards almost horizontally. The upper halves are vertical and apical. The yellowish pollen masses (pollinia) form a pollinarium, they are connected to the dark brown pollen carrier (corpusculum) by light brown translator arms (caudicula). The style hood or gynostegium typical of the silk plants is 2 to 3 mm long. The flower, like all related species, acts as a trap flower. It is also believed to be pollinated by flies.
The chromosome number is 2n = 22.
Fruits and seeds
The fruits are in pairs. The species blooms from July to September.
Similar species
Ceropegia media is closely related to Ceropegia evansii . It has narrower, more hairy leaves, smaller flowers and a cup-shaped corolla with staminal corolla lobes bent almost at right angles. Also Ceropegia omissa is similar.
Geographical distribution and ecology
The species has a small range in the districts of Pune , Satara , Ratnagiri , Sangli and Ahmednagar in the state of Maharashtra , India. It blooms at the site at an altitude of 500 to 1500 m above sea level from July to September; Fruits can be seen from August to October.
The species grows on mountain slopes, often together with Strobilanthes callosa , and on forest edges, often under Memecylon umbellatum .
According to Kamble et al. Ceropegia media grows in symbiosis with mycorhizal fungi.
Taxonomy
The taxon was introduced into the literature in 1957 by Herbert Huber as Ceropegia evansii var. Media . Mohammed Yunus Ebrahim Ansari raised the variety to species rank in 1971. Today it is generally accepted as an independent species. The holotype comes from the Indian state of Maharashtra, 70 miles north of Pune.
Within the genus it is classified in the section Buprestis H.Huber, which includes about 13 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
- Herbert FJ Huber : Revision of the genus Ceropegia. In: Memorias da Sociedade Broteriana. 12: 1–203, Coimbra, 1957, p. 67 (as Ceropegia evansii var. Media var. Nov.)
Individual evidence
- ↑ a b c d e Sharad Suresh Kambale: Taxonomic Revision of Genus Ceropegia L. in India. Thesis, Shivaji University, Department of Botany, 2015. Chapter 5 download
- ↑ a b c S. A. Punekar: Asclepiadaceae Ceropegia media (Huber) Ansari. PDF
- ↑ Annemarie Heiduk, Irina Brake, Michael v.Tschirnhaus, Jean-Paul Haenni, Raymond Miller, John Hash, Samuel Prieto-Benítez, Andreas Jürgens, Steven D.Johnson, Stefan Schulz, Sigrid Liede-Schumann, UlrichMeve, Stefan Dötterl (2017 ): Floral scent and pollinators of Ceropegia trap flowers. Flora 232: 169-182. doi: 10.1016 / j.flora.2017.02.001
- ↑ Vishal R. Kamble, Ruchira R. Sutar: A New Record of Endemic and Endangered Plant mycorrhizal: Ceropegia Media (Huber) Ansari From India. Journal of Environmental Science, Toxicology and Food Technology, 10 (5): 79-85, 2016 PDF
- ^ Mohammed Yunus Ebrahim Ansari: Ceropegia media (Huber) Ansari Stat. Nov. from Western Ghats (Maharashtra). Nelumbo - Bulletin of the Botanical Survey of India, 11 (1-2): 199-201, (1969) 1971 doi : 10.20324 / nelumbo / v11 / 1969/75877
- ↑ 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. Pp. 83-113, International Asclepiad Society 2007, p. 101.