Eriogonum pharnaceoides


in L. Sitgreaves, Rep. Exped. Zuni Colorado Rivers, 167, plate 11. 1853.

Treatment appears in FNA Volume 5. Treatment on page 408. Mentioned on page 382.

Herbs, erect or spreading, annual, 1–5 dm, villous, greenish, yellowish green, or reddish. Stems: caudex absent; aerial flowering stems erect or nearly so, solid, not fistulose, 0.1–0.8 dm, villous. Leaves basal and cauline; basal: petiole 0.1–0.5(–1) cm, blade linear-lanceolate to linear-oblanceolate, 1–4 × 0.1–0.4 cm, white-lanate abaxially, villous and greenish to yellowish green adaxially, margins plane or revolute; cauline sessile, blade linear, 0.5–2.5 × 0.05–0.3 cm, tomentose abaxially, thinly villous or glabrous and greenish adaxially. Inflorescences cymose, open, 5–45 × 3–40 cm; branches villous; bracts 3–8, semileaflike, 5–15 × 0.3–1.5(–2) mm. Peduncles erect or nearly so, straight, slender, (1–)2–5(–7) cm, sparsely villous or glabrous. Involucres campanulate, 1–2 × 2–3 mm, villous; teeth 5, mostly erect to spreading, 1–3 mm. Flowers 1–3 mm; perianth white to rose or yellow, sometimes becoming reddish, glabrous; tepals dimorphic, those of outer whorl oblong-ovate, 2-saccate-dilated proximally, those of inner whorl linear-oblong; stamens mostly included, 1–1.5 mm; filaments mostly pilose proximally. Achenes brown to blackish, lenticular, 1.8–2 mm, glabrous.


V5 844-distribution-map.gif

Ariz., N.Mex., Nev., Utah, including n Mexico.


Varieties 2 (2 in the flora).

Selected References



1 Perianths white to rose; n and e Arizona, w New Mexico, Mexico Eriogonum pharnaceoides var. pharnaceoides
1 Perianths yellow; nw Arizona, se Nevada, sw Utah Eriogonum pharnaceoides var. cervinum