Monographs Details: Desmanthus virgatus var. depressus (Humb. & Bonpl. ex Willd.) B.L.Turner
Authority: Isley, Duane. 1973. Leguminosae of the United States: I. Subfamily. Mimosoideae. Mem. New York Bot. Gard. 25 (1): 1-152.
Description:Distribution and Ecology - S Texas; s Florida. Texas: primarily lower Rio Grande Plains, open dry alkaline soils to mud flats; brushy prairies, mesquite-cactus scrub, disturbed areas, semiweedy. Florida: pinelands, shell mounds, hammocks, beach strand, weedy along roadsides and in urban areas. March-Oct. or all year in Florida keys. American tropics.
Discussion:D. depressus H. & B. ex Willd.
Acuan texanum Britt. & Rose
A. tracyi Britt. & Rose
This is the most common form of D. virgatus in the United States. I can discern no difference between the plants, frequent in disturbed or ruderal areas, of s Texas and Florida.
A few specimens from southern Texas are of erect, suffrutescent plants. I have mapped them separately; except for habit they are seemingly var. depressus, not quite var. virgatus of the tropics but the line is thin.
Distribution:United States of America North America