June 2014


the old picture – Ceropegia stapeliiformis

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c.stapeliiformis.cbm

Ceropegia stapeliiformis Haw.

Depiction from: ‘Curtis’s Botanical Magazine 64. 1837’

http://www.biodiversitylibrary.org

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… the first time

My very first Ceropegia sandersonii of the ‘monteiroae‘ clone, and its very first flower. 😛

c.sandersonii.250614.1

The second new addition in 2014

Bought today – as Ceropegia denticulata ssp. brownii – a new Ceropegia nilotica, a clone from KwaZulu-Natal, which produces high quantities of offshoots.

Which are the next relatives of the two isolated Canary Islands Ceropegia species?

According to a new scientific paper (see below), which also contains some new phylogenetic trees, the next relatives of Ceropegia dichotoma and Ceropegia fusca from the Canary Islands are three species from Asia, resp. Australia, namely Ceropegia cumingiana, Ceropegia intermedia and Ceropegia pubescens.

According to the paper, the Canary Islands were colonised by the genus Ceropegia only once.

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The phylogenetic trees furthermore show – again – that the genus Ceropegia as such does not exist, but is either a much larger genus, including all of the Brachystelma species and some of the stapeliad species (or perhaps even all of them), or it must be split into several smaller genera (that is what I would prefer), with the name Ceropegia remaining for Ceropegia candelabrum (the species that was first described under that genus name) and its relatives.

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… by the way: the paper is naming my website as a source for pictures. 😛

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source:

– Ambroise Valentin: Phylogenetic position of Ceropegia dichotoma and Ceropegia fusca and their biogeographical origin. Uppsala Universitet 2014

Ceropegia evansii McCann

Ceropegia evansii scheint offenbar bevorzugt zwischen Karvi-Sträuchern (Strobilanthes callosus (Nees)) zu wachsen, wo man die Pflanzen nur recht schwer entdecken kann. [2]

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Es handelt sich um eine windende Kletterpflanze mit einer 2 bis 6 cm breiten, unterirdischen Knolle.

Der Trieb ist meist unverzweigt und nur leicht oder gar nicht behaart.

Die Blätter sind 7 bis 14 cm lang, 3 bis 7 breit und oval oder länglich oval geformt.

Die Blüten stehen in wenigblütigen Blütenständen, sie sind etwa 6 cm lang. Der untere Teil ist hellgrau oder weißlich gefärbt und manchmal mit grauen Streifen versehen. Die Petalen sind in der unteren Hälfte weiß, in der oberen hellgelb gefärbt.

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Ceropegia evansii galt bereits als ausgestorben, wurde aber später wieder entdeckt. Sie bleibt jedoch, wie viele andere indische Arten auch, stark gefährdet. [1]

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Ceropegia evansii McCann

Ceropegia evansii obviously prefers to grow in the thick canopy of stands of Karvi (Strobilanthes callosus (Nees)), where the plants are only difficult to locate. [2]

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This is a twining climber with an 2 to 6 cm wide, subterranean storage tuber.

The stem is almost always unbranched and not or only slightly pubescent.

The leaves are 7 to 14 cm long, 3 to 7 cm wide and ovate or ovate-lanceolate in shape.

The flowers stand in few flowered inflorescences, they are about 6 cm long. The lower part is light grey or whitish in colour and sometimes shows faint greyish lines. The petals are white in their lower half and pale yellow in their upper.

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Ceropegia evansii was already believed to be extinct, but was rediscovered later. But like many other indian species, it is still very threatened. [1]

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Referenzen / References:

[1] P. Tetali; S. Tetali; P. Lakshminarasimhan; P. V. Prasanna; B. G. Kulkarni: Rediscovery of Ceropegia evansii McCann, Asclepiadaceae, from Maharashtra. Journal of the Bombay Natural History Society 100: 162-166. 2003
[2] S. R. Yadav; Mayur Y. Kamble: Threatened Ceropegias of the Western Ghats and Strategies for Their Conservation. Special Habitats and Threatened Plants of India. ENVIS Bulletin: Wildlife and Protected Areas, Wildlife Institute of India, Dehradun, India 11(1): 146-157. 2008

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c.evansii.pp

Foto / Photo: Preeti Patil; mit freundlicher Genehmigung von / by courtesy of Preeti Patil

http://www.indianaturewatch.net/view_cat.php?tag=Preeti%20Patil