Cryptostegia grandiflora R. Br. - syn.Nerium grandiflorum Roxb. - Asclepiadaceae - (Indian) rubber vine, **Indischer Gummiwein**

Evergreen climbing shrub, 1.50-3m high, native to Madagascar, naturalized in Australia, the Pacific, America; leaves opposite, ovate-elliptic, narrowed at both ends; flowers large, funnel-shaped, showy, pinkish to lilac-purple. \\
[[http://www.efloras.org/florataxon.aspx?flora_id=12&taxon_id=220003567]] \\
[[http://www.efloras.org/florataxon.aspx?flora_id=5&taxon_id=220003567]]

"Cryptostegia grandiflora is highly toxic to farm animals like cows, sheep and goats,... cardiac glycosides are responsible for the toxic effects." \\
[[http://de.wikipedia.org/wiki/Cryptostegia_grandiflora]]

The leaves contain cardiac glycosides like oleandrigenin 3-O-b-glucopyranosyl-(1->4)-b-cymar-
opyranosyl-(1->4)-b-digitoxopyranoside (cryptostigmin I), oleandrigenin 3-O-b-glucopyranosyl-(1->4)-a-rhamnopyranoside (cryptostigmin II), 16-propionylgitoxigenin 3-O-b-glucopyranosyl-(1->4)-a-rhamnopyranoside (cryptostigmin III) and oleandrigenin 3-O-b-glucopyranosyl-(1->6)-b-glucopyranosyl-(1->4)-b-cymaropyranosyl-(1->4)-b-digitoxopyranoside (cryptostigmin IV), subalpinosid (previously isolated from //Digitalis subalpina// by Lichius et al. 1991) and 16-O-acetyl-digitalinum verum (previously isolated from  //Addenium obesum// (Yamauchi and Abe, 1990).  \\
[Cardiac glycosides from Cryptostegia grandiflora., Kamel, M.S., Assaf, M.H., Abe, Y., Ohtani, K., Kasai, R., Yamasaki, K., Phytochemistry, Vol.58(4), 2001, 537-542]

{{:cryptostegia_grandiflora.jpg?600}} \\
Miquel, F.A.W., Choix de plantes rares ou nouvelles, cultivées et dessinées dans le jardin botanique de Buitenzorg, t. 8 (1864) [J.E.L. Jung] \\
[[http://plantgenera.org/species.php?id_species=295936]]

{{https://upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Starr_980529-4191_Cryptostegia_grandiflora.jpg/1024px-Starr_980529-4191_Cryptostegia_grandiflora.jpg?800}} \\
Cryptostegia grandiflora, © Forest & Kim Starr, [[https://commons.wikimedia.org/wiki/File:Starr_980529-4191_Cryptostegia_grandiflora.jpg|Wikimedia Commons]] [[http://creativecommons.org/licenses/by-sa/3.0/|CC BY-SA 3.0]]