Moving closer towards a result regarding kinship relations within the several ‘Ceropegia’ lineages.

It appears that there may actually be as much as 13 distinct, more or less closely related genera involved in forming the artificial genus Ceropegia, see here.:

The genera Brachystelma Sims and Ceropegia L. of the Ceropegieae (Apocynaceae-Asclepiadoideae) consist of ±320 species of geophytes and slender climbers with a tendency to stem-succulence in Ceropegia. They occur in and around the semi-arid, mainly tropical parts of the Old World. For 146 species (around half of the total) from most of the geographic range of the genera, we analysed data from two nuclear and five plastid regions. The evolution of Ceropegia is very complex, with at least 13 mostly well-supported lineages, one of which is sister to the ±350 species of stapeliads. Species of Brachystelma have evolved at least four times, with most of them nested within two separate major lineages. So, neither Brachystelma nor Ceropegia is monophyletic. We recover a broad trend, in two separate major lineages, from slender climbers to small, geophytic herbs. Several clades are recovered in which all species possess an underground tuber. Small, erect, non-climbing, geophytic species of Ceropegia with a tuber are nested among species of Brachystelma. Consequently, the distinctive tubular flowers used to define Ceropegia do not reflect relationships. This re-iterates the great floral plasticity in the Ceropegieae, already established for the stapeliads. Both major lineages exhibit a trend from tubular flowers with faint, often fruity odours, pollinated by very small Dipteran flies, to flatter flowers often with a bad odour, pollinated by larger flies. Most of the diversity in Brachystelma and Ceropegia is recent and arose within the last 3my against a background of increased aridification or extreme climatic variability during the Pliocene. In the ingroup, diversity is highest in Southern Africa, followed by Tropical East Africa and other arid parts of Africa, the Arabian Peninsula and India. Many disjunctions are revealed and these are best explained by recent, long distance dispersal. In Africa, the diversity arises from the presence of many different lineages over wide areas but there is also evidence of closely related species growing together with different pollinators.

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source:

– P. V. Bruyns; C. Klak; P. Hanáček: Recent radiation of Brachystelma and Ceropegia (Apocynaceae) across the Old World against a background of climatic change. Molecular Phylogenetics and Evolution 90: 49-66. 2015

The first new addition in (and probably the only for) 2015

Hi there!

I can’t belive it myself, but I managed to snatch a Ceropegia rhynchantha. :P

The tiny plant consists of a small stem with two leaves, yet is growing, and of course has been far from beeing a cheap bargain. ;)

Unresolved, invalid or simply misspelled names – part 2

Sometimes, strange names appear in the offers of nurseries, like these two examples.:

Ceropegia suprafoliata author? – this appears to be a very bad misspelling of Ceropegia superba D. V. Field & Collen., since I found that respective species in the list of a South African nursery named under that strange name.

This name is now found in the listings of other nurseries too, I don’t know why.

~~~

Ceropegia tanzamalawlense author? – I found this name in the list of an well-known nursery, I have no idee at all where it may originate from, maybe from the geographical origin of the plant, which in fact is existing, since it was included in the nursery’s offer, but which of course must be a distinct species.

Btw: I checked different spellings of the last one, including tanzamalawiense, tanzmalawense etc. but found out nothing at all.

Unresolved, invalid or simply misspelled names – part 1

There are some scientific names, sometimes appearing in listings etc., which seem to lead to nowhere, in some cases these can be assigned to plants which were obviously described by someone under these respective names.

Two examples are given here.:

Ceropegia bemarahaica M. G. Gilbert – described from the Tsingy de Bemaraha Strict Nature Reserve in the Antsalova District / Melaky Region in the east of Madagascar.

Ceropegia brachyantha M. G. Gilbert – described (by the same author) from the Manongarivo Massif in the Ambanja District / Diana Region in the north of Madagascar.

Both names are unresolved, no one seems to know anything about these two enigmatic ‘species’.

Ceropegia langkawiensis R. E. Rintz

Ceropegia langkawiensis wurde nach ihrem Typusfundort benannt, der Insel Langkawi, der Hauptinsel der Langkawi-Inseln vor der Nordwestküste des malaysischen Bundesstaates Kedah.

Die Art wurde an einem Sandstrand östlich der Stadt Kuah gefunden, wo sie im Unterwuchs der Strandvegetation wuchs. [1]

~~~

Es handelt sich um eine mehr als 6 m groß werdende, windende Kletterpflanze mit sehr dünnen, unbehaarten Trieben.

Die Blattstiele und Blätter sind behaart, sie sind etwa 5 cm lang und breit lanzettförmig geformt.

Die Blütenstände bestehen aus bis zu sechs, grünlich gefärbten und purpurn gemusterten Blüten. [1]

~~~

Der Autor, der die Art im Jahr 1979 beschrieb, stellt sie in die Verwandtschaft der aus Indochina stammenden Arten Ceropegia kachinensis Prain und Ceropegia monticola W. W. Sm.. [1]

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Ceropegia langkawiensis R. E. Rintz

Ceropegia langkawiensis was named after its typus locality, the island of Langkawi, the main island of the Langkawi Islands offshore the northwest coast of the Malaysian state of Kedah.

The species was found on a sandy beach east of the town of Kuah, where it grew in the undergrowth of the beach vegetation. [1]

~~~

It is an more than 6 m tall growing, twining climber with very thin, glabrous stems.

The petioles and leaves are pubescent, they are about 5 cm long and broad lancet shaped.

The inflorescences bear up to six, greenish coloured flowers with red spots. [1]

~~~

The author, who described the species in the year 1979, puts it into close relationship to the Indochinese species Ceropegia kachinensis Prain and Ceropegia monticola W. W. Sm.. [1]

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Referenzen / References:

[1] R. E. Rintz: Three new species of Asclepiadaceae from peninsular Malaya. Blumea 25: 225-231. 1979′

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c.langkawiensis.al

Darstellung / Depiction: Alexander Lang

the old picture – Ceropegia pubescens

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c.pubescens.nw.par

Ceropegia pubescens Wall.

Darstellung aus: ‘N. Wallich: Plantae Asiaticae Rariores; or, Descriptions and Figures of a select number of unpublished East Indian plants. London: Treuttel and Würtz 1830-32′

http://www.biodiversitylibrary.org

it’s done …

… the first flower of my Ceropegia crassifolia has opened. :P

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c.crassifolia.270415.1

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