(Greek-made compound, referring to the flowers being borne in heads). Rubiacese. Tropical shrubs, sub-shrubs or herbs, one of which yields ipecac; some of them sometimes rarely seen in growing collections. As the genus is commonly delimited, it comprises perhaps 75 species of both the eastern and western hemispheres. Engler & Prantl and others, however, unite it with the Linnaean Uragoga. Leaves opposite, usually ovate, oblong or obovate: flowers mostly small, white, collected in an involucrate head; calyx 4-7-toothed and persistent; corolla trumpet-shaped or salver-shaped, the short limb 4-5-lobed; stamens 4 or 5, inserted in the throat of the corolla: fruit a dry or fleshy 2-seeded drupe. C. Ipecacuanha, Willd. (Psychotria Ipecacuanha, Muell. - Arg. Uragoga Ipecacuanha, Baill.), from the root of which the commercial ipecac is produced, is a low creeping herb (4-8 in. high) with oblong-ovate entire leaves which are pubescent beneath: heads becoming pendulous: root slender, knotty; it is exported in large quantities from Brazil. L. H, b.