Ceropegia rollae
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Ceropegia rollae Hemadri |
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Ceropegia rollae is a species of the subfamily of the silk plant family (Asclepiadoideae).
features
Vegetative characteristics
Ceropegia is an upright herbaceous plant with a tuber. The shoots reach heights of 30 to 100 cm and do not branch. They are fleshy and studded with short, globular hair. The leaves are opposite, occasionally three leaves arise from a knot. The leaf stalks are up to 1.5 cm long. The leaf blade is broadly ovate, and 2.5 to 6.0 cm long and 2.0 to 4.0 cm wide. The leaf blades are glabrous on the underside, with spherical, bristly hairs on the edges and top. The base is rounded, the apex pointed or pointed briefly.
Inflorescence and flowers
The flowers are arranged in approximately umbel-shaped, upright inflorescences . The inflorescences arise from the leaf axils or are mostly decent. The inflorescence stalks are 1 to 2 cm long and hairy with bristles. The sepals are linear-lanceolate, 3 to 5 mm long and only sparsely hairy. The flowers sit on a 0.4 to 1 cm long, cross-sectioned flower stalk, which is also hairy with bristles. The hermaphrodite flowers are zygomorphic and five-fold with a double flower envelope. In the lower part they have grown together to form a flower tube. The whitish corolla is 2.3 to 2.5 cm long, almost straight to slightly curved. Of this, the flower tube accounts for about three quarters of the length. The cross-section at the narrowest point is 3 to 4 mm. The inflated part at the base (crown cup) is not very pronounced and 5 to 8 mm long, and 4 to 6 mm in cross section. It gradually merges into the actual flower tube. The inside of the crown bowl is largely bare, only the bottom is covered with translucent fluffy hairs. The corolla can have purple longitudinal stripes in the lower part. The petal lobes are oblong, linear, 0.8 to 1.3 cm long, 0.25 cm wide and glabrous. They are each fused at the top and form an egg-shaped or approximately spherical, cage-like head. The secondary crown has a short stalk and fused basal shell-shaped. The interstaminal (outer) hairy tips are entire or two-pointed. The tips of the inner (staminal) secondary crown are up to 3 mm long, upright, linear with a slight back curve. The pollinarium measures about 350 μm in length and almost 300 μm in width. The corpusculum (pollen carrier) measures up to 179 μm in length. The head measures 59 to 72 μm in length and 86 to 90 μm in width, the apex is rounded. The elongated lanceolate Pollinia (pollen masses) are up to 293 μm long and measure up to 124 μm in width. The translator arms are up to 79 μm long and 24 μm in diameter.
Fruits and seeds
The slender, spindle-shaped follicles are arranged in pairs and stand upright. They measure 4.5 to 6.0 cm in length and 0.2 to 0.3 cm in cross section. The seeds are egg-shaped with a tuft of hair.
Similar species
Ceropegia rollae is closely related to Ceropegia karulensis and Ceropegia sahyadrica . All three species have a white corolla, a saucer-shaped outer corolla and linear corners of the inner corolla. The corolla is colored purple in the lower part and the bottom is hairy down. Ceropegia rollae differs from Ceropegia sahyadrica by the umbel- like, almost terminal inflorescences (lateral with Ceropegia shaydrica ), the shorter corolla and the color of the flowers, especially inside the corolla. The Kronkessel is also not so much bloated and elongated-linear Kronblattzipfeln.
Ceropegia rollae differs from Ceropegia karulenis in that it has broad, egg-shaped leaves, the less swollen corolla and the elongated, linear tips of the inner corolla.
Danger
The species is endangered because of its highly fragmented populations and needs immediate protection.
Geographical distribution and ecology
The species occurs only in a small area in the Ahmednagar district (Harishchandragadh) and Pune district (Dhak Killa, Durga Killa near Durga wadi, Malshej Ghat) of the Indian state of Maharashtra . It grows there in the crevices in large basaltic blocks on exposed hilltops at 1200 to 1350 m above sea level.
Taxonomy
Ceropegia rollae was first described in 1969 by Kuppola Hemadri. In the subsequent episode, the species was mostly regarded as a synonym for Ceropegia lawii . In the more recent studies, Ceropegia rollae is now always listed as an independent species (e.g. by Punekar et al. Systematics and Molecular Phylogenetic Analysis of Erect Species of Ceropegia ... ). According to the latter authors, Ceropegia lawii is said to be closely related to Ceropegia panchganiensis and Ceropegia mahastrensis .
Ceropegia rollae type material was collected at Dhak Khilla, approximately 27 km west of Junnar , Pune District (formerly Poona District), Maharashtra. The holotype is kept under the number K. Hemadri 107472 A in the Central National Herbarium, Haora , West Bengal (CAL), as are the paratypes K. Hemadri 107547 C and 1077547 D and the isotype 107472 F. The paratypes are from Durga Khilla, around 30 km west of Junnar, Pune District. Isotypes of the former location are also found in the herbarium of the Botanical Survey of India (BSI) (K. Hemadri 107472 BC), in the herbarium of the Royal Botanic Gardens in Kew (K. Hemadri 107472 D) and in the herbarium of the Naturalis Biodiversity Center in Leiden (K Hemadri 107472 E) deposited.
literature
- Sachin A. Punekar, Shubhada A. Tamhankar, P. Lakshminarasimhan, KPN Kumaran, Ajit L. Raut, SK Srivastava: Systematics and Molecular Phylogenetic Analysis of Erect Species of Ceropegia Section Buprestis (Apocynaceae, Asclepiadoideae) with Two New Species from India. Nelumbo, 55: 6-30, 2013 PDF (ResearchGate)
Individual evidence
- ^ 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 .
- ↑ 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, under Ceropegia lawii p. 98.