T.R. Van Devender, A.L. Reina-G, G. Ferguson, F. Reichenbacher, C.L. Smith
Mexico, Sonora, Mpio. Nacozari de García, 1.5 km SE of Rancho el Tigre, ENE of Mina el Tigre, 28.3 km (by air) WNW of Bavispe, 51.5 km (by air) ENE of Nacozari de García, Sierra el Tigre
30.58268 -109.19954 WGS84
2291 metros
7517 ft
Wet seep in pine-oak woodland
Quercus rugosa
Annual grass, 40 cm; 6 bristles per spikelet; bristles yellow, turning reddish-purple at tips