Monographs Details: Mimosa xanthocentra subsp. subsericea var. exilis
Authors:Rupert C. Barneby
Authority: Barneby, Rupert C. 1991. Sensitivae Censitae. A description of the genus Mimosa Linnaeus (Mimosaceae) in the New World. Mem. New York Bot. Gard. 65: 1-835.
Description:Variety Description - Like var. subsericea but simultaneously diminished in stature, length of pinnae, number of leaflets, and girth of capitula, the dimensions given in the Latin diagnosis.
Distribution and Ecology - In cerrado, 1000 m, known only from the type-locality near Lago do Paranoá in the city of Brasília, this close to populations of robust, long leaved, thick-capitulate var. subsericea.—Y\. II- III(-?).
The var. exilis may be an extreme variant of or mutant from var. subsericea fated to be reabsorbed into sympatric stock, but it is visually so striking as to require notice of some kind. By providing a name, I hope to draw the attention of botanists at Universidade de Brasília to a readily accessible problem in genetics and dispersal.
Distribution:Brazil South America