Robinsonella pilosa subsp. septentrionalis Fryxell
Descripción
Shrubs or small trees 2-5 m tall, the branches glabrate. Leaf blades mostly 7— 10 cm long, ovate or 3-lobulate, cordate or truncate, subentire, acute, with palmate venation, somewhat discolorous, minutely pubescent to glabrate, more or less concolorous; petioles ca. half the length of the blades; stipules 2-3 mm long. Flowers in axillary fascicles; pedicels 0.5-2 cm long, slender, densely pilose, the hairs up to 0.5 (-1) mm long; calyx 5-7 mm long, ca. half-divided, densely pilose, the lobes lanceolate, often reflexed in fruit; petals 8—14 mm long, yellow or yellow green, ciliate on claw, with minute twisted hairs abaxially; staminal column 3-4 mm long, pallid, pubescent, the stamens 25-35, the filaments 2 mm long; styles 15-20, pallid, sometimes pubescent. Mericarps 15-20, 12-15 mm long; seeds 3 mm long. Chromosome number unknown.A
Distribución
México (país) EndémicoA
Tipo de vegetación
Matorral de otro tipo, Selva bajaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Robinsonella pilosa Rose, subsp. pilosa occurs in Honduras and Nicaragua. Robinsonella pilosa subsp. septentrionalis grows in dry matorral and deciduous forest. It was described on the basis of collections from the general vicinity of Tampico and distinguished on the basis of several characters (Fryxell 1973a). Subsequent collections from central Veracruz (cited below), however, show an intermediacy that places in doubt the distinctiveness of the two subspecies.A