Parietaria hespera var. hespera
Herbs, 0.3-5.5 dm. Leaf blades narrowly to broadly ovate, less frequently oblong or nearly orbiculate, 0.4-4.5 × 0.4-2.7 cm, conspicuously longer than wide, base broadly cuneate, rounded, or truncate, apex distally rounded or acuminate to acute or obtuse. Flowers: involucral bracts 1-4.5 mm; tepals erect, loosely connivent at maturity, ca.2-2.8 mm, apex acute.
Phenology: Flowering late winter–early summer, rarely at other times.
Habitat: Chaparral, deserts, roadsides, sand dunes, often in shaded and moist places
Elevation: 0-1400 m
Ariz., Calif., Nev., N.Mex., Utah, nw Mexico.