Stems with inflorescences near The Chimneys at Big Bend National Park, 3/23/06.
Plant habit near The Chimneys at Big Bend, 3/23/06.
An inflorescence near The Chimneys, 3/23/06.
Backlit branches with young leaves and immature inflorescences in the Chisos Mts. at Big Bend, 3/21/06.
Young plants showing the effects of erosion in sandy soil, near Flat Lake, 10 Feb 2007.
Plant habit in Bouteloua eriopoda/Gutierrezia microcephala grassland, Jornada del Muerto, 15 Dec 2007.