Merremia tuberosa

HAWAIIAN WOOD ROSE, LARGE -- Merremia tuberosa. Family Convolvulaceae (Bindweed family). 

Woodrosin I (65) is an ether-insoluble glycolipid isolated from the stems of Ipomoea tuberosa L. (Merremia tuberosa (L.) Rendle) commonly called woodrose after the shape of its dried calyx (28). Its lactone moiety spans four glucose units to form a 27-membered macrocycle. Further challenges arise from the additional acylation pattern at the periphery of the branched and hence highly hindered pentasaccharide perimeter of this glycoconjugate. 

Wood rose Ipomoea violacea Merremia tuberosa 1 Seeds are hallucinogenic... 

The content of cuscohygrine in dried roots is widely divergent and may vary from 0.00001% (Merremia tuberosa) to 0.15% (Convolvulus floridus) according to a study on 14 species [Calystegia (1), Convolvulus (9), Merremia (3), Ipomoea (1)] (Jenett-Siems 1996). 

Genus Merremia Tuberosa allies ( section ) M. aurea (Kell.) O Donell + + + 1... 

Taxa with simple tropanes (Tl) two species belonging to the Tuberosa allies, three species of section Merremia, two species nested within section Xanthips, and one species of section Hailale. 

With the exception of Calystegia and Operculina most of the species belonging to the remaining genera (Convolvulus, Cuscuta, Merremia except M. tuberosa) are of Asian origin. This is also true for 0. turpethum whereas 0. macrocarpa (like M. tuberosa) is a neotropical species. 

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