Chinchweed

coarse sandy volcanic soil with rhyolite and basalt gravels on open grassy drainage flat along road

fragrant foliaged annuals on pale reddish quartz sands of colorful an outlier of low semi-stabilized dunes, north of the active dune field in the Mdanos de Samalayuca Natural Protected Area.

roadside in alkaline calcareous soils of bolson flats bordered by mesquite scrub thickets.

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

annuals in sandy calcareous soil outwash from low limestone hillside among a large stand of Agave scabra, with Jatropha, Fouquieria, Larrea.

coarse sandy volcanic soil with rhyolite and basalt gravels on open grassy drainage flat along road

fragrant foliaged annuals on pale reddish quartz sands of colorful an outlier of low semi-stabilized dunes, north of the active dune field in the Mdanos de Samalayuca Natural Protected Area.

roadside in alkaline calcareous soils of bolson flats bordered by mesquite scrub thickets.