Commelinales

on open, grassy, undulating plain in basin along & below eastern Madrean escarpment, among diverse grasses and forbs on coarse volcanic alluvium.

White flowering population in partly shaded pine understory on volcanic tuff substrate.

opening in pine flats understory with volcanic tuff substrate

opening in pine flats understory with volcanic tuff substrate

on burned over pine flat south of campground

on old graded roadside pullout of volcanic tuffaceous fill above Rio Papigochic tributary with Desmodium batocaulon, Dalea leporina, Acmispon plebieus & Macroptilium.

clearing in pine flats of the Madrean highlands on shallow volcanic soil and gravels over rhyolitic tuff substrate

open roadside, crest of eastern escarpment of Madrean plateau in thin soil & gravel over volcanic tuffaceous substrate.

opening in pine flats understory with volcanic tuff substrate

Plants in grasses on reddish volcanic rhyolite of on grassy, moderate hillside slope with Dahlia scherffii, Salvia emaciata, Verbena pinetorum, Milla biflora. Note short beak & 3 near equal petals. Original ID as C. coelestis, which is now considered a synonym under C. tuberosa

on coarse volcanic gravels and alluvial sands below rhyolitic tuff cliffs forming narrow canyon bottom drained by small perennial creek. Original ID as C. coelestis, which is now considered a synonym under C. tuberosa

in grasses on moist alluvial volcanic soils between a small perennial creek and a large bare outcrop of pale weathered rhyolitc tuff