Monographs Details: Calliandra laxa var. urimana Barneby
Authors:Rupert C. Barneby
Authority: Barneby, Rupert C. 1998. Silk tree, guanacaste, monkey's earring: A generic system for the synandrous Mimosaceae of the Americas. Part III. Calliandra. Mem. New York Bot. Gard. 74: 1-223.
Family:Mimosaceae
Description:Variety Description - Lf-formula iv-vi/17-22; lf-stks of larger lvs 2.5-5 cm, the petiole 9-17 mm, the longer interpinnal segments 4.5-8 mm; rachis of longer pinnae 3-5 cm; lfts thinly pilosulous facially, the larger ones 4-6.5 x 1.8-2.5 mm; inner posterior primary nerve faint and short; peduncles 2.5-4 cm.

Distribution and Ecology - At savanna edge and on rocky stream banks, ±370400 m, localized in the middle Caroní basin in Bolivar, Venezuela, within 5°15'-45'N, 62°20'-50'W, on ríos Urimán, Aprada and Acanán near the foot of Auyan- and Uaipan-tepuis. — Map 4. — Fl. I—III.

Distribution:BolĂ­var Venezuela South America|