Hybriden / Hybrids


Ceropegia sandersonii x nilotica

Diese Form ist eine der wenigen, echten Naturhybriden der Gattung.

Der Hybrid tauchte zuerst in Kultur auf, muss aber als Naturhybrid betrachtet werden, da die Pflanzen auf Samen zurückgehen, die in der Natur gesammelt wurden, genauer von einer Ceropegia sandersonii Decne. ex Hook. f. aus den Makatini Flats in KwaZulu-Natal in Südafrika.

Die Pflanze wurde bereits in R. A. Dyers ‘Ceropegia, Brachystelma and Riocreuxia in southern Africa’ abgebildet (als Ceropegia grandis E. A. Bruce). [1][2]

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Das Foto zeigt eine kultivierte Pflanze die wahrscheinlich diesen Hybrid darstellt.

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Ceropegia sandersonii x nilotica

This form is one of very few true natural hybrids within this genus.

The hybrid appeared first in cultivation, yet is still to be regarded as a natural hybrid since the plants originated from seed that was collected in the wild, to be more precise from a Ceropegia sandersonii Decne. ex Hook. f. growing in the Makatini Flats in KwaZulu-Natal in South Africa.

The plant was already depicted in R. A. Dyers ‘Ceropegia, Brachystelma and Riocreuxia in southern Africa’ (as Ceropegia grandis E. A. Bruce). [1][2]

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The photograph shows a plant in cultivation that probably represents this hybrid.

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References:

[1] R. A. Dyer: Ceropegia, Brachystelma and Riocreuxia in southern Africa. A A Balkema Publishers 1983
[2] Ralph Peckover: The Ceropegias of the Makatini Flats. Aloe 30(1): 20-22. 1993

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c.nilotica.x.sandersonii.fhut

Photo: Friedericke Hübner & Ulrich Tränkle; by courtesy of Friedericke Hübner & Ulrich Tränkle

www.asclepidarium.de

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Ceropegia aristolochioides ssp. deflersiana x rupicola

Diese schöne Form wurde im Jahr 1980 anhand von Pflanzen als neue Varietät beschrieben, die nahe der Stadt Al Qa’idah und einem benachbarten Ort im Gouvernement Ibb im Jemen gefunden wurden.

Sie unterscheidet sich von der Normalform durch ihre Blüten, die größere Öffnungen haben und eine behaarte Innenseite (ein Merkmal, das bei der gewöhnlichen Form unbekannt ist). [1]

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Diese Form ist entweder tatsächlich eine Varietät oder ein Naturhybrid mit Ceropegia aristolochioides ssp. deflersiana Bruyns. Solche Hybriden finden sich auch in Kultur, allerdings ist oft unklar ob es sich hierbei um Pflanzen der selben Herkunft handelt oder um Hybriden mit der afrikanischen Nominatform der Ceropegia aristolochioides Decne., die spontan in Kultur entstanden sind. [2]

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Das Foto zeigt eine kultivierte Pflanze, sehr wahrscheinlich der echten jemenitischen Form.

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Ceropegia aristolochioides ssp. deflersiana x rupicola

This beautiful form was described as a new variety in the year 1980 on the basis of plants that were found near the city of Al Qa’idah and in another nearby locality in the Ibb Governorate of the Yemen.

It differs from the common form in its flowers, which have larger openings and which are covered with hairs on the inner surface (a feature that is not known in the common form). [1]

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This form is now either a variety or rather a naturally occurring hybrid with Ceropegia aristolochioides ssp. deflersiana Bruyns. Such hybrids are in fact known in cultivation too, however, it seems not to be known if they are of the same origin, or if they rather represent hybrids with the African nominate race of Ceropegia aristolochioides Decne., appeared spontaneously in cultivation. [2]

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The photograph shows a cultivated plant that may very well be the actual Yemenite form.

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Referenzen / References:

[1] N. P. Taylor: A new variety of Ceropegia rupicola. The Cactus and Succulent Journal of Great Britain 42(4): 111-112. 1980
[2] Focke Albers; Ulrich Meve: Illustrated Handbook of Succulent Plants: Asclepiadaceae. Springer 2002

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c.r.v.stictantha.cg

Foto / Photo: Cok Grootscholten; mit freundlicher Genehmigung von / by courtesy of Cok and Ine Grootscholten

Copyright Grootscholten Succulenta nursery, Honselersdijk, The Netherlands

http://www.succulenta-kwekerij.nl

Ceropegia zeyheri – or rather not?

This is a  plant, commonly sold as Ceropegia zeyheri, not only in Germany but also all over Europe – but it isn’t C. zeyheri!

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The leaves are much too large and actually not scale-like as they should be.

I made a dissection through one of the faded flowers of my plant and exposed its gynostegial corona to compare it to the material known to me (in fact just some drawings). They are indeed very distinct and do not resemble each other, the gynostegium is more like that of C. distincta and its allies, but in no way identical to that of the real C. zeyheri.

The shape of the flower is quite distinct from that of the true C. zeyheri – yet, it does not really match that of any other species known to me, the exterior is completey covered with fine hair, a feature, that is found very rarely in that way, for example in C. somalensis.

The inner surface of the lower third of the corolla is dark purple coloured, while in C. zeyheri the basal inflation of the flower has longitudinal, darkened lines on the inner surface.

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This plant may actually be a hybrid of C. zeyheri with perhaps C. distincta or even with C. somalensis!

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c.zeyheri.al

All photographs: Alexander Lang

c.sp.231114.1

c.sp.231114.2

Ceropegia x rothii Gürke

As far as I know, this is the first true artifical hybrid in the genus Ceropegia, that means it was made by hand pollinating, which is very complicated.

The pollen of Ceropegia radicans Schltr. was used to successfully pollinate Ceropegia sandersonii Decne. ex Hook. f., the offspring was named Ceropegia x rothii, a hybrid that is still very commonly cultivated. [2]

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References:

[1] M. Gürke: Ceropegia sandersoni Hook. x radicans Schlecht. (C. rothii Gürke n. hybr.). Monatszeitschrift für Kakteenkunde 21(1): 8-9. 1911
[2] P. Roth: Ueber Ceropegien. Die Gartenwelt 15(25): 337-339. 1911

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c.x.rothii.mg

above:

The plant in front is C. radicans, the two plants behind are C. x rothii.

Photo from: ‘P. Roth: Ueber Ceropegien. Die Gartenwelt 15(25): 337-339. 1911’

http://www.biodiversitylibrary.org

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c.x.rothii.cg

above:

A plant in cultivation which most probably represents this hybrid.

Photo: Cok Grootscholten; by courtesy of Cok und Ine Grootscholten

Copyright Grootscholten Succulenta nursery, Honselersdijk, The Netherlands

http://www.succulenta-kwekerij.nl

Ceropegia hybrida N. E. Br.

This hybrid appeared in cultivation (… and therefore isn’t actually a natural one, by the way …) and was described in 1909, the parents are Ceropegia elegans Wall. (as Ceropegia similis N. E. Br.) as father, and Ceropegia sandersonii Decne. ex Hook. f. as the mother.

The stem is succulent as in C. sandersonii, the leaves are smaller than in either parent, the flowers are very like those of the numerous other C. sandersonii hybrids, which can be found. [1]

This hybrid is also known by the name of Ceropegia meyeri-arthuri Herter. [2][3]

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References:

[1] N. E. Brown: Ceropegia hybrida, N. E. Brown (a new natural hybrid), and C. similis, N. E. Brown (n. sp.). The Gardeners’ Chronicle 3(40): 383-384. 1909
[2] M. Gürke: Ceropegia sandersoni Hook x radicans Schlecht. (C. rothii Gürke n. hybr.). Monatszeitschrift für Kakteenkunde 21(1): 8-9. 1911
[3] P. Roth: Ueber Ceropegien. Die Gartenwelt 15(25): 337-339. 1911

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c.x.hybrida.neb

above:

Depiction from: ‘N. E. Brown: Ceropegia hybrida, N. E. Brown (a new natural hybrid), and C. similis, N. E. Brown (n. sp.). The Gardeners’ Chronicle 3(40): 383-384. 1909′

http://www.biodiversitylibrary.org

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c.x.hybrida.cg

above:

A plant in cultivation that obviously fits very well with the description.

The colouration of the flower of C. hybrida is described as follows: green at the base, light green above, and the funnel-shaped part white, marked with five broad, dull green stripes, alternating with five series of connected purple-brown spots.

Photo: Cok Grootscholten; by courtesy of Cok und Ine Grootscholten

Copyright Grootscholten Succulenta nursery, Honselersdijk, The Netherlands

http://www.succulenta-kwekerij.nl