Chamaecrista greggii var. potosina

Title

Chamaecrista greggii var. potosina

Author(s)

Howard S. Irwin, Rupert C. Barneby

Scientific Name

Chamaecrista greggii var. potosina (Britton & Rose) H.S.Irwin & Barneby

Description

34b. Chamaecrista greggii (A. Gray) Pollard ex A. Heller var. potosina (Britton & Rose) Irwin & Barneby, Phytologia 44(7): 500. 1979. Chamaecrista potosina Britton & Rose, N. Amer. Fl. 23(5): 283. 1930.—"Minas de San Rafael, San Luis Potosi, May, 1911, Purpus 4832 "—Holotypus, so labelled, NY! isotypi, sub eodem num. ex "Buena Vista, XI. 1910," G, GH, US!—Cassia potosina (Britton & Rose) Standley, Field Mus., Bot. 22: 78. 1940.

Lvs up to 1.2-2.3 cm; lfts commonly (l-)2, rarely 2-4 pairs, those of longer lvs oblanceolate and up to 11-17 x 2.5-5 mm; venulation as given in key.— Collections: 9.

In desert scrub on limestone or perhaps sometimes on gypsum, 620-2500 m, localized in intermontane valleys of Sa. Madre Oriental and plains w. of the crest in s.-w. Tamaulipas and e. San Luis Potosí, from Miquihuana and Jaumave s. to Río Verde.—Fl. V-XII.