Ipomoea ternifolia Cav.

on low ridge of mineralized gossen soil altered from tuffaceous rhyolite

on low ridge of mineralized gossen soil altered from tuffaceous rhyolite

on low ridge of mineralized gossen soil altered from tuffaceous rhyolite

on low ridge of mineralized gossen soil altered from tuffaceous rhyolite

on low ridge of mineralized gossen soil altered from tuffaceous rhyolite

on low ridge of mineralized gossen soil altered from tuffaceous rhyolite

on low ridge of mineralized gossen soil altered from tuffaceous rhyolite

in rhyolitic tuff gravels on steep south facing, mid-canyon slope

on gravelly volcanic rhyolite tuff substrate in steeply terraced lower part of canyon

on coarse rhyolitic tuff gravels in side canyon drainage just above the Rio Batopilas

on coarse rhyolitic tuff gravels in side canyon drainage just above the Rio Batopilas

on coarse rhyolitic tuff gravels in side canyon drainage just above the Rio Batopilas

mixed accumulation of volcanic gravels and fine alluvial soils of bluff just above the riverside road

mixed accumulation of volcanic gravels and fine alluvial soils of roadside bluff just above the Rio Urique

plants on exposed limestone hillside with Opuntia rufida, Sengalia crassifolia, Sericodes greggii, Agave scabra.

View of bracteoles. Small twinning vine with thread-like divided leaves on coarse gravelly volcanic(rhyolite) soil of large, wide, braided sheet-wash arroyo.

Note bee cut access to nectary in flower tube without pollination service. Small twinning vine with thread-like divided leaves on coarse gravelly volcanic(rhyolite) soil of large, wide, braided sheet-wash arroyo.

Flower bud. Small twinning vine with thread-like divided leaves on coarse gravelly volcanic(rhyolite) soil of large, wide, braided sheet-wash arroyo.

short clamoring vine growing at base of south face of roadcut in rhyolite ridge

short clamoring vine growing at base of morth face of roadcut in rhyolite ridge

short clamoring vine growing at base of south face of roadcut in rhyolite ridge

short clamoring vine growing at base of south face of roadcut in rhyolite ridge