Setaria reverchonii

(Vasey) Pilg.
Synonyms: Panicum reverchonii
Treatment appears in FNA Volume 25. Treatment on page 546.

Plants perennial; rhizomatous, rhizomes, short, sometimes knotty. Culms 30-90 cm; nodes glabrous, strigose, or with appressed hairs. Sheaths with papillose-based hairs, sometimes nearly glabrous, margins ciliate distally; ligules 1-2 mm, of stiff hairs; blades 4-30 cm long, 1-7 mm wide, involute, stiff, scabridulous and narrowed basally. Panicles 5-20 cm, erect, slender, interrupted; rachises scabrous; bristles 2-8 mm. Spikelets 2.1-4.5 mm, elliptic to obovate, randomly dis¬tributed on the branch axes. Lower glumes 1/2 as long as the spikelets, 5-7-veined; upper glumes equaling the upper lemmas, 7-9-veined; lower lemmas equaling the upper lemmas; lower paleas absent; upper lemmas indurate, finely and transversely rugose; upper paleas similar to the upper lemmas.

Discussion

Setaria reverchonii grows in sandy prairies and limestone hills from eastern New Mexico, southwestern Oklahoma, and Texas to northern Mexico.

Selected References

None.

Key

1 Blades usually more than 15 cm long; spikelets 3.5-4.5 mm long Setaria reverchonii subsp. reverchonii
1 Blades usually less than 15 cm long; spikelets 2.1-3.2 mm long. > 2
2 Blades 2-4 mm wide; spikelets about 2.5 mm long Setaria reverchonii subsp. ramiseta
2 Blades 4-7 mm wide; spikelets about 3-3.2 mm long Setaria reverchonii subsp. firmula