Briquetia Hochr.
Contenido
Descripción
Herbs or subshrubs 0.5-1.5 m tall, usually with a single erect stem, branching only in inflorescence, more or less soft-pubescent with stellate and simple hairs. Leaves long-petiolate below to sessile and amplexicaul immediately below the inflorescence, the blades broadly ovate, sometimes somewhat lobulate, deeply cordate, serrate to undulate (or even subentire), acute or acuminate, lacking foliar nectaries. Inflorescence a leafless terminal spike or panicle, the flowers generally subtended by small trifid bractlets; involucel absent; calyx S-lobed, small; petals yellow; androecium included, pallid, antheriferous at apex; styles 5-14, the stigmas capitate. Fruits schizocarpic but pseudocapsular, strigose or glabrate; mericarps 5~ 14, 2-celled (or upper cell vestigial in the type species), the cells divided by a simple endoglossum, the lower cell 1-seeded, the upper cell 1~-2-seeded; seeds more or less pubescent. Base chromosome number: x = 7.A
Discusión taxonómica
Briquetia is a genus of four species, two from northern Mexico, one from Brazil and Paraguay, and one extending from Mexico and Cuba to Brazil and Bolivia.A