Viguiera parishii Greene, Bull. Torrey Bot. Club 9: 15. 1882; V. deltoidea A. Gray var. parishii (Greene) Vasey & Rose

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.