Mexico, Baja California, Rte 1, 5.5 mi E of Rosario and 4.5 mi NE (left fork) to Rancho.
30.067905 -115.748573 +-15000m.
Flats in alluvial soil above arroyo.
Flowers collected afternoon and morning, diameter 31-40 mm, length 49-57 mm; outer perianth yellow-green or bronze with a reddish-brown midstripe at tip; inner perianth pale olive green with a reddish-brown midstripe; thigmotrophic positive, stigma lobe number 4-6, color yellow; filament reddish-brown; ovary/base of flower covered with long reddish-brown glochids; joints gray-green with mature joints gray; spines gray on older joints, tan with golden sheaths on newer; areoles slightly tuberculate, with few spine clusters;
Grown in cultivation at the Desert Botanical Garden. Additional flowers collected on 27 May 2003, 5 May 2005, and 16 May 2005. Collected by Joni Ward on 20 May 2003.