Flower comparison between the widespread Cynanchum viminale (left) and the endemic Rodrigues cynanchum (right). Note the tusk-like inner lobes of the C.viminale flowers, which are skirted by a low ring around the corona base. The inner lobes of C. guehoi are fused into one round, compact cylinder. Each lobe-tip is thickened and triangular, and there is no ring around the corona base.
Cynanchum guehoi is a leafless vine with cylindrical, twining, fleshy, glabrous stems and a toxic white sap. When not in flower it is extremely easy to confuse with the common Cynanchum viminale which is widespread across Africa and southern Asia and also naturally occurs in Rodrigues.
The fragrant flowers smell faintly of Jasmine. They are born in bunches, at the branch internodes. Each flower has five outer lobes, which open out and look like the petals of a flower. However the Rodrigues cynanchum's inner lobes are formed into a single corona in the centre, about 1.5 mm high. The tip of each inner lobe is triangular, with a thick, slightly curved lip.[2]
The related Cynanchum viminale also has five outer lobes resembling petals. However the corona is skirted at its base by a thin ring (the outer coronal ring). Its inner coronal lobes are smooth, oval and curved inwards like tusks.[3][4]
Wikimedia Commons has media related to Cynanchum guehoi.
Referencesedit
^J. C. Autrey; J. Bosser; Ian Keith Ferguson (2005). Flore des Mascareignes: la Réunion, Maurice, Rodrigues. 121 Apocynacées à 126 Boraginacées. IRD Editions. pp. 22–4. ISBN978-2-7099-1563-2.
^Bosser, J. Flore des Mascareignes: 121, Apocynacées à 126, Boraginacées, Coll., Botanical Garden of Kew (U.K.) & MNH, 2005. p 22-23.
^Kirsakye, S. La Faune et la Flore de Rodrigues. Mauritian Wildlife Foundation. 2015. p.38.
^Strahm, W. Plant Red Data Book for Rodrigues Koeltz Scientific Books. 1989.
This Apocynaceae article is a stub. You can help Wikipedia by expanding it.
cynanchum, guehoi, rodrigues, cynanchum, rare, plant, from, subfamily, asclepiadoideae, within, family, apocynaceae, endemic, island, rodrigues, indian, ocean, rodrigues, cynanchum, growing, anse, quitor, nature, reservescientific, classificationkingdom, plant. Cynanchum guehoi the Rodrigues cynanchum is a rare plant from the subfamily Asclepiadoideae within in the family Apocynaceae It is endemic to the island of Rodrigues in the Indian Ocean 1 Cynanchum guehoiThe Rodrigues cynanchum growing at Anse Quitor Nature ReserveScientific classificationKingdom PlantaeClade TracheophytesClade AngiospermsClade EudicotsClade AsteridsOrder GentianalesFamily ApocynaceaeGenus CynanchumSpecies C guehoiBinomial nameCynanchum guehoiBosserDescription edit nbsp Flower comparison between the widespread Cynanchum viminale left and the endemic Rodrigues cynanchum right Note the tusk like inner lobes of the C viminale flowers which are skirted by a low ring around the corona base The inner lobes of C guehoi are fused into one round compact cylinder Each lobe tip is thickened and triangular and there is no ring around the corona base Cynanchum guehoi is a leafless vine with cylindrical twining fleshy glabrous stems and a toxic white sap When not in flower it is extremely easy to confuse with the common Cynanchum viminale which is widespread across Africa and southern Asia and also naturally occurs in Rodrigues The fragrant flowers smell faintly of Jasmine They are born in bunches at the branch internodes Each flower has five outer lobes which open out and look like the petals of a flower However the Rodrigues cynanchum s inner lobes are formed into a single corona in the centre about 1 5 mm high The tip of each inner lobe is triangular with a thick slightly curved lip 2 The related Cynanchum viminale also has five outer lobes resembling petals However the corona is skirted at its base by a thin ring the outer coronal ring Its inner coronal lobes are smooth oval and curved inwards like tusks 3 4 nbsp Wikimedia Commons has media related to Cynanchum guehoi References edit J C Autrey J Bosser Ian Keith Ferguson 2005 Flore des Mascareignes la Reunion Maurice Rodrigues 121 Apocynacees a 126 Boraginacees IRD Editions pp 22 4 ISBN 978 2 7099 1563 2 Bosser J Flore des Mascareignes 121 Apocynacees a 126 Boraginacees Coll Botanical Garden of Kew U K amp MNH 2005 p 22 23 Kirsakye S La Faune et la Flore de Rodrigues Mauritian Wildlife Foundation 2015 p 38 Strahm W Plant Red Data Book for Rodrigues Koeltz Scientific Books 1989 nbsp This Apocynaceae article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Cynanchum guehoi amp oldid 1118695363, wikipedia, wiki, book, books, library,
