Thelypodium texanum

An uncommon annual found on crumbly calcareous slopes in the Big Bend area.

Plant habit at Tornillo Creek, Big Bend National Park, 15 Apr 2007.

Inflorescences at Tornillo Creek, 15 Apr 2007.

Immature fruits at Tornillo Creek, 15 Apr 2007.

Flowers at Tornillo Creek, 15 Apr 2007.

Basal leaves at Tornillo Creek, 15 Apr 2007.

A small plant at Tornillo Creek, 15 Apr 2007.