Senna neglecta var. grandiflora

Title

Senna neglecta var. grandiflora

Authors

Howard S. Irwin, Rupert C. Barneby

Scientific Name

Senna neglecta var. grandiflora H.S.Irwin & Barneby

Description

137b. Senna neglecta (Vogel) var. grandiflora Irwin & Barneby, var. nov., a var. neglecta praesertim florum manifeste majorum sepalis 8.5-11 (nec 5-8) mm petalisque 14-19 (nec 9-13) mm usque longis, foliolisque utrinque (nec dorso tantum) venulosis diversa.—BRAZIL. Minas Gerais: aolado da Rodovia BR-4, km 777 [=Jequetinonha valley in n.-w. Minas], 27.VI.1968 (fl, fr), R. P. Belem 3769.— Holotypus, NY; isotypi, CE- PEC, K, R, US.

Lfts elliptic-obovate or broadly oblanceolate, obtuse mucronulate, densely or thinly pilosulous beneath with incumbent hairs ±0.3-0.5 mm, glabrous above, the margin revolute, the tertiary venulation of either face subequally prominulous; fl-buds either densely yellowish-pilosulous or subglabrous; sepals up to 8.5-11 mm; longer petals 14-19 mm; pod (little known) ±18 x 0.85 cm; ripe seeds not seen.—Collections: 4.

Habitat not recorded, but someimes (typus) associated with limestone outcrops, apparently local on the Atlantic slope of the Brazilian Planalto between the valleys of rios Jequetinonha and Mucuri in the s.-e. lobe of Bahia and adjoining Minas Gerais (lat. ±16°-17°30'S).—Fl. V-VII.

Clearly distinguished from var. neglecta by the more ample perianth, although the androecium is not proportionately increased. Our two collections from Minas Gerais are alike in having densely pilosulous, almost velvety sepals, whereas in our one from Bahia (Monte Pascoal near Pto. Seguro, Lanna & Castellanos 15201 2626, CEPEC, NY) the sepals are almost glabrous. The pod of the latter, possibly distinct form, may provide a basis for segregation.