Herbs, spreading, not scapose, 2–5 (–6) × 2–5 dm, glabrous, green. Stems spreading, without persistent leaf-bases, up to 1/5 height of plant; caudex stems spreading, glabrous; aerial flowering-stems erect, slender, solid, not fistulose, 1.2–3 dm, glabrous, tomentose among leaves. Leaves basal or sheathing up stem less than 2 cm, 1 per node; petiole (0.1–) 3–7 (–10) cm, tomentose to floccose or glabrous; blade linear or oblong to oblanceolate or elliptic, 2–8 (–10) × 0.2–2.5 (–3) cm, thinly to densely white-tomentose abaxially, glabrous and green adaxially, margins plane or slightly revolute. Inflorescences cymose, open, 10–30 × 10–25 cm; branches dichotomous, glabrous; bracts 3, scalelike, linear, 2–5 (–7) mm. Peduncles absent. Involucres 1 per node, turbinate, 2–3 (–3.5) × 1–1.5 (–2) mm, glabrous; teeth 5, erect, 0.4–0.5 mm. Flowers 3–3.5 mm; perianth yellow or white, glabrous; tepals connate only at base, monomorphic, oblong to obovate; stamens slightly exserted, 3–3.5 (–4) mm; filaments sparsely pilose proximally. Achenes light-brown to brown, 2.5–3 mm, glabrous except for slightly papillate beak.

Distribution

• Generated Map
• Legacy Map

Ariz., Utah

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Lower Taxa

Eriogonum thompsoniae var. albiflorum, Eriogonum thompsoniae var. atwoodii, Eriogonum thompsoniae var. thompsoniae

Key

1	Leaf blades linear, 3-8(-10) × 0.2-0.4(-0.6) cm	Eriogonum thompsoniae var. atwoodii
1	Leaf blades oblong to oblanceolate or elliptic; 2-5 × 0.8-2.5(-3) cm	> 2
2	Perianths yellow	Eriogonum thompsoniae var. thompsoniae
2	Perianths white	Eriogonum thompsoniae var. albiflorum

"/2" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.