Gaillardia arizonica

A. Gray

in A. Gray et al., Syn. Fl. N. Amer. 1(2): 353. 1884.

Synonyms: Gaillardia arizonica var. pringlei (Rydberg) S. F. Blake
Treatment appears in FNA Volume 21. Treatment on page 426. Mentioned on page 422.

Annuals, 5–40 cm. Leaves mostly basal, mostly restricted to proximal 1/5(–1/3+); petiolar bases 0–2+ cm; blades oblanceolate, obovate, or spatulate, 3–6(–9) cm × 5–25 mm, mostly raggedly pinnately lobed, sometimes entire, sparsely to densely villous with jointed hairs. Peduncles 5–35 cm. Phyllaries 14–20, lanceolate to lance-attenuate, 6–12+ mm, ciliate with jointed hairs. Receptacular setae 0 or 0.3–0.8 mm. Ray florets 10–13; corollas yellow to orange, 17–22 mm. Disc florets 40–100+; corollas yellow, tubes 0.6–0.8 mm, throats campanulate, 2.8–3 mm, lobes deltate, 0.5–0.7 mm, jointed hairs to 0.3 mm. Cypselae obpyramidal, 2 mm, hairs 2 mm, inserted at bases and on angles and faces; pappi of 8–10 obovate or ovate to lanceolate, aristate or muticous scales 2–5 mm (if aristate, scarious bases 2–3.5 × 1.3–1.6 mm). 2n = 34.

Phenology: Flowering Mar–May.
Habitat: Sandy desert washes and fans
Elevation: 300–1200 m



Ariz., Nev., Utah, Mexico (Sonora).


Selected References


Lower Taxa