Allenrolfea occidentalis

(S. Watson) Kuntze

Revis. Gen. Pl. 2: 546. 1891

Basionyms: Halostachys occidentalis S. Watson Botany (Fortieth Parallel), 293. 1871
Treatment appears in FNA Volume 4. Treatment on page 321. Mentioned on page 322, 335.
Plants 3–15 dm, ± glaucous. Stems woody proximally, fleshy distally; articulations (joints) (2–)3–5(–10) × 1–4.5 mm. Leaves deciduous; blade 2–4 × 2–3 mm. Inflorescences 6–25 × 2.5–4 mm. Utricles enclosed by perianth. Seeds ca. 0.6 mm.

Phenology: Flowering mid summer–late fall.
Habitat: Alkaline soils, mostly on raised sandy hummocks in salt playas and mud flats
Elevation: 1000-1700 m


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Ariz., Calif., Idaho, N.Mex., Nev., Oreg., Tex., Utah, Mexico.


A dominant shrub of salt playas and mudflats in the American Southwest, iodine bush is easily distinguished from great distances by the dark hue of its stems. The blackish-colored shrubs stand in stark contrast to surrounding vegetation and on close examination can be easily distinguished from the opposite-branched, but vegetatively similar members of Sarcocornia.



Lower Taxa

No lower taxa listed.