United States, Texas, Matagorda, Ca. 1.2 airmiles SE of HQ of Mad Island Marsh Preserve (TNC). Palacios NE Quadrangle.
28.6355 -96.08503 +-10000m.
Common in sand and crushed oyster shells in bed of jeep road on natural shell ridge along NW bank of Intracoastal Waterway. Associates include Agalinis strictifolia, Eragrostis curtipedicellata, Croton mononthogynus, Gaillardia pulchella, Leptochloa dubia, Mentzelia oligosperma, Portulaca pilosa.