Shrubs, 50–150 cm. Stems 1–5+, erect or spreading, spiny, evenly pannose. Leaves: primaries forming straight, ± squarrose spines, 10–50 mm; secondaries filiform to clavate, 2–12(–20) mm, sparsely arachnose or glabrous. Heads 1–3 (in axils of spines). Peduncles 4–15 mm. Involucres turbinate to campanulate, 7–9 mm. Phyllaries 5, ovate. Florets 5–7; corollas pale yellow, 7.5–9 mm. Cypselae 4.5–5.5 mm, densely pilose (hairs 6–14 mm); pappi of ca. 25, subulate to setiform scales 6–7.5 mm.

Distribution

• Generated Map
• Legacy Map

Calif., Nev., Utah

Discussion

Varieties 2 (2 in the flora).

The two varieties of Tetradymia axillaris are partially sympatric and intergrade in areas of overlap.

Selected References

None.

Lower Taxa

Tetradymia axillaris var. axillaris, Tetradymia axillaris var. longispina

Key

1	Peduncles and phyllaries pannose to tomentose; hairs of cypselae 9–14 mm	Tetradymia axillaris var. longispina
1	Peduncles and phyllaries glabrous; hairs of cypselae 6–8(–10) mm	Tetradymia axillaris var. axillaris