Horsfordia A. Gray
Contenido
Descripción
Erect herbs or subshrubs, stellate-tomentose or stellate-scabrous. Leaves petiolate, the blades suborbicular, ovate, or lanceolate, obscurely crenate-dentate, obtuse to acute, lacking foliar nectaries; stipules 2-5 mm long, subulate, deciduous. Flowers solitary in the leaf axils or paniculately aggregated; involucel absent; calyx 5-lobed; petals 2-3 times the length of the calyx, yellow-orange or lavender, often drying bluish; androecium included, pallid or yellowish, antheriferous at apex; styles 6-11, exceeding the androecium, the stigmas capitate, purplish. Fruit schizocarpic; mericarps 6-11, dehiscent and flaring apically, glabrous or slightly pubescent, basally rugose, usually with two prominent apical wings, with a solitary seed in the base and usually also with 1-2 seeds in the upper part; seeds minutely pubescent or verruculate. Base chromosome number: x = 15.A
Discusión taxonómica
Horsfordia is a genus of four species from Baja California, Sonora and the southern parts of California and Arizona.A