Froelichia arizonica

Thornber ex Standley

in N. L. Britton et al., N. Amer. Fl. 21: 128. 1917.

Common names: Arizona snake-cotton
Treatment appears in FNA Volume 4. Treatment on page 445. Mentioned on page 444.
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Plants perennial; taproot enlarged, woody. Stems 1–several, ascending or decumbent, often branched distally, 3–10 dm, sericeous-tomentose with white hairs. Leaves usually crowded at base, few on stems, sessile or short-petiolate; blade lanceolate, proximal leaves 3–12 × 0.5–2.5 cm, base attenuate, apex acute or rarely obtuse, scaberulous or canescent adaxially, sericeous-tomentose with bright whitish hairs abaxially. Spikes dense, stout, flowers arranged in 3-ranked spiral; bracteoles dark, glabrous. Flowers (3.5–)4–5.5 mm; perianth lobes narrowly oblong, apex obtuse, or acutish, pubescence dense, bright white; filament lobes stramineous or darkened, blunt. Utricles narrowly or broadly winged laterally, 2.5–5.5 × 3–4.5 mm, longer than broad, wing margins irregularly dentate, 1 or both surfaces of perianth with 1 or more basal tubercles or spines.

Phenology: Flowering year-round.
Habitat: Open rocky or gravelly hillsides
Elevation: 700-2200 m


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Ariz., N.Mex., Tex., Mexico (Chihuahua, Coahuila, Nuevo León).


Selected References


Lower Taxa