Monographs Details: Cusparia
Authority: Cowan, Richard S. 1967. Rutaceae of the Guayana Highland. Mem. New York Bot. Gard. 14: 1-14.
Family:Rutaceae
Scientific Name:Cusparia
Description:Genus Description - Rossenia Vellozo, Fl. Flum. 31. 1825. Trees or shrubs, often single-stemmed with the alternate or opposite, 1-7-foliolate leaves clustered at the apex. Inflorescence mostly racemose-paniculate, the lateral branchlets abbreviated. Calyx cupular or campanulate, sometimes angular, the margin sinuate, 4-5-toothed, or with distinct lobes; petals 4-5, imbricate in the bud, erect in anthesis, united in a short tube. Stamens (4-)5(-8), all or only the upper 2-3 fertile, the anthers unappendaged but the connective sometimes drawn out in a mucro. Disk urn-shaped or cupular, angularly 5-toothed, as tall as or exceeding the ovary. Stigma small, often capitate, 4-5-furrowed; ovary 5-carpellate, the carpids united only to the central axis, sometimes raised on a distinct gynophore. Segments of the fruit 1-3, free, one-seeded.

Discussion:

Bonplandia Willdenow, Mem. Acad. Berlin 1802: 24. 1804.

Angostura Roemer & Schultes, Syst. 4: 188. 1819.

Conchocarpus Mikan, Del. Fl. & Faun. Brasil. t. 2. 1820.

Diglottis Nees et Martius, Nov. Act. Acad. Nat. Cur. II: 151, 170. 1823.

Lasiostemum Nees & Martius, Nov. Act. Acad. Nat. Cur. II: 152, 171. 1823.

Dangervilla Vellozo, Fl. Flum. 27. 1825.

Obentonia Vellozo, Fl. Flum. 18. 1825.

Rossenia Vellozo, Fl. Flum. 31. 1825.

Type species. C. febrifuga Humboldt ex A. P. DC.