Mexico, Sonora, Mpio. de Puerto Penasco. Northwest of Puerto Penasco, 1.2 mile (odometer) on dirt road paralleling (north side of) RR west of SE boundary of El Pinacate Reserva de la Biosfera (along road and RR to Estacion Gustavo Sotelo), then ca. 100 m southward from RR tracks.
31.545 -113.743
DMS: 31d 30m 16.2s N; 113d 38m 39.5s W; TRS: T R S
Sand flats and low stabilized dunes or sand hills. Low areas with well-formed, thick blackish microphytic crust. Ca 85-90% cover of ephemerals.
Ambrosia dumosa, Atriplex barclayana, A. canescens, Cylindropuntia echinocarpa, Frankenia palmeri, Isocoma acradenia, Larrea, Lycium brevipes, Suaeda nigra