Setaria macrosperma

(Scribn. & Merr.) K. Schum.
Common names: Coral bristlegrass
Treatment appears in FNA Volume 25. Treatment on page 550.

Plants perennial. Culms 1-1.5 m. Sheaths prominently keeled, margins villous; ligules 1-3 mm; blades 1-2 cm wide, flat, scabrous. Panicles to 25 cm, loosely spicate; rachises readily visible, sparsely villous; bristles 1(2), 15-30 mm, flexible, antrorsely scabrous. Spikelets 3-3.2 mm. Lower glumes about 1/3 as long as the spikelets, 3-veined; upper glumes about 3/4 as long as the spikelets, 5-veined; lower lemmas equaling the upper lemmas; lower paleas about 1/2 as long as the upper paleas, hyaline, narrow; upper lemmas finely and transversely rugose; upper paleas similar to the upper lemmas. 2n = unknown.


Setaria macrosperma grows on shell or coral islands, and occasionally in old fields or hammocks. It is most frequent in Florida, but has been collected in both South Carolina and Georgia. It also grows in the Bahamas and Mexico.

Selected References


Lower Taxa