Ceropegia barnesii

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Ceropegia barnesii
Systematics
Family : Dog poison family (Apocynaceae)
Subfamily : Silk plants (Asclepiadoideae)
Tribe : Ceropegieae
Sub tribus : Stapeliinae
Genre : Candlestick flowers ( Ceropegia )
Type : Ceropegia barnesii
Scientific name
Ceropegia barnesii
EABruce & Chatterjee

Ceropegia barnesii is a species of the subfamily of the silk plants (Asclepiadoideae).

features

Vegetative characteristics

Ceropegia is a perennial , herbaceous plant . The upright, winding stem axes are round and bare. The constantly against arranged on the stem axis leaves are divided into petiole and leaf blade. The slender petioles are 2 to 3 cm long and bare. The relatively thin, entire leaf blades are 18 to 24 cm long and 4 to 6 cm wide and are narrowly ovate-lanceolate with a heart-shaped base of the blades and a pointed outer end ( akuminate ). The upper side of the leaf is very sparsely hairy, the hairiness becomes somewhat thicker towards the edges. The underside of the leaf is bare. The seven to ten leaf veins on both sides of the midrib rise.

Inflorescence and flower

The lateral, slender inflorescence stem is 2.5 cm long and thinly hairy. The umbel-shaped inflorescence is a three to five-flowered cyme . The flower stalks are slightly shorter than the inflorescence stem. The bracts are very small, sub-like and hairy. The hermaphrodite flowers are zygomorphic , five-fold and with a double flower envelope . The five bare sepals are subphrate and pointed at a length of 6 to 7 mm. The corolla is up to 4 cm long. In the lower part, the five petals are fused to form an externally bare, slightly curved corolla tube ( sympetalie ). The corolla tube is about 3 cm long, and in the lower part it swells up to a spherical "crown kettle". The "Kronkessel" reaches a diameter of 1.3 cm, above this the diameter decreases to 5 mm. At the funnel-shaped mouth of the flower, the diameter expands to about 2 cm. The petal lobes are broadly triangular-ovate and about 1.4 cm long, and about the same width at the base. The outer end is pointed, the outer ends are fused and form a spherical, cage-like structure about 2 cm in diameter. The (double) secondary crown is fused cup-shaped at the base. The tips of the interstaminal , outer secondary crown are transformed into very small, pocket-shaped and very sparsely downy hairy appendages, which alternate with the tips of the staminal , inner secondary crown . These are upright, club-shaped and 2 to 3 mm long. They are bare, smooth, and pale brown-yellow when dried. Only at the base is there a dark, 0.5 mm spot. It blooms in the home area in May and June.

Fruit and seeds

The paired, very slender follicles diverging at an acute angle are glabrous, straight and about 20 cm long and round with a diameter of only 5 mm in cross section. The numerous, elongated seeds are light brown with a thickened edge when dried and measure approximately 1 cm in length. The white, silky head of hair is 4 to 5 cm long.

Similar species

Ceropegia barnesii differs from all other species of the genus Ceropegia occurring in India by its typical leaves, which are much larger than all other species. The corolla resembles the species Ceropegia intermedia Wight, but the corolla is much larger and the petal tips are wider.

Occurrence and endangerment

Ceropegia barnesii occurs in the southern Indian states of Karnataka ( Dakshina Kannada ), Kerala and Tamilnadu (Pykara waterfalls). It seems to be very rare. Due to its rarity and its very local occurrence, it is classified as "Endangered" = "highly endangered".

Taxonomy

Ceropegia barnesii was first described in 1948 by Eileen Adelaide Bruce and Debabarta Chatterjee in Volume 3 of the Kew Bulletin , pp. 62-63. Synonyms are not known.

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 (p. 10)
  • Herbert FJ Huber: Revision of the genus Ceropegia. In: Memórias da Sociedade Broteriana , Volume 12, 1957, pp. 1–203, Coimbra (p. 63)
  • AP Jagtap, N. Singh, N .: Asclepiadaceae and Periplocaceae. In: Fascicles of Flora of India , Fascicle 24, 1999, pp. 211-241, Botanical Survey of India, Kolkata (p. 216).

Individual evidence

  1. ↑ Peppara Wildlife Sanctuary Thiruvananthapuram Kerala.
  2. ↑ K. Sri Rama Murthy, R. Kondamudi, M. Chandrasekhara Reddy, S. Karuppusamy, T. Pullaiah: Check-list and conservation strategies of the genus Ceropegia in India. International Journal of Biodiversity and Conservation, Volume 4, No. 8, 2012, pp. 304-315 doi : 10.5897 / IJBC12.011
  3. ↑ Redlist - Kerala Biodiversity Board
  4. ^ Debabarta Chatterjee: New Plants from India and Burma. In: Kew Bulletin , Vol. 3, No. 1, 1948, pp. 57-65. (Pp. 62–63 Description of Ceropegia barnesii EA Bruce et Chatterjee sp. Nov.)
  5. ↑ 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.

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