Shrubs, 50-130 cm. Leaves mostly opposite, sometimes alternate (distal); petioles 2-8 mm; blades deltate to deltate-ovate, 1-3.5 × 1-3.5 cm, margins usually toothed, faces: abaxial hispid and gland-dotted (and slightly reticulate), adaxial scabrous, (bases of hairs notably enlarged). Heads (1-)3-5. Peduncles 1-15 cm. Involucres hemispheric, 8-13 × 5-9 mm. Paleae ovate to oblong, 5.5-7 mm. Phyllaries 16-28, 3-9 × 1.5-2 mm. Ray florets 8-15; laminae 10-15 mm. Disc florets 50+; corollas 3.5-5 mm. Cypselae 2.7-3.2 mm; pappi of 2(-6) lacerate, aristate scales 2.1-2.5 mm plus (0-)2-6 lacerate scales 0.5-1 mm. 2n = 36. Flowering (Jan-Oct). Xeric scrub; 500-1500 m; Ariz., Calif., Nev.; Mexico (Baja California, Sonora). Bahiopsis parishii is a diploid that is closely related to polyploids that have traditionally been recognized as varieties of B. (Viguiera) deltoidea and occur throughout the Baja California Peninsula in Mexico.

Plant: Shrub < 2 m diam, short-rough-hairy throughout; stem 6-13 dm, much-branched Leaves: simple, opposite below, alternate above; petiole 2-8 mm; blade generally 1-3.5 cm, triangular-ovate, 3-veined from obtuse to truncate or subcordate base, tip obtuse to acute, entire or teeth few, short, surfaces green to lightly canescent INFLORESCENCE: primary inflorescence a head, each resembling a flower; heads solitary or in open, few-headed cymes; peduncles 3-15 cm, slender, bracts 0 or few and leaf-like; heads radiate; involucre 10-13 mm diam, hemispheric or appearing disk-like when pressed; phyllaries in 2-3 equal or unequal series, 3-9 mm, lance-oblong, tips abruptly narrowed, surface green to canescent; chaff scales 5-6 mm Flowers: Ray flowers 8-15 sterile; ligules 1-1.5 cm, corolla yellow; ligules entire to 3-lobed; Disk flowers: many; corollas 3.5-5 mm, yellow or orange; anther tips triangular; style tips triangular Fruit: achenes, 2.7-3.8 mm, ± flattened, obovate, glabrous or ± hairy; pappus of 2 fringed scales (each 0.5-1 mm) and 2-3 lanceolate scales (each 2-3 mm) Misc: Washes, dry, rocky slopes; < 1500 m.; Feb-Jun, Sep-Oct Notes: achenes 4-angled References: J.C. Hickman, ed. The Jepson Manual.L. Benson & R. Darrow. Trees and Shrubs of the Southwestern Deserts. W.B. McDougal. Seed plants of Northern Arizona. ASU specimens.