Erigeron petrophilus

Perennials, 10–20(–30) cm; taprooted, caudices woody, branches rhizomelike. Stems usually decumbent-ascending, sometimes nearly erect, sparsely to densely white-villous (hairs loose, thin, often crinkly) or sparsely hispido-pilose (hairs usually stiff, spreading, sometimes antrorsely ascending or appressed; var. viscidulus), usually densely minutely glandular at least distally, sometimes eglandular or obscurely glandular (var. viscidulus). Leaves cauline; blades narrowly oblong to oblanceolate, 10–25 × 1–5 mm, usually even-sized, margins entire, ciliate, faces sparsely to densely villous to hirsuto-villous, usually densely minutely glandular, sometimes eglandular or obscurely glandular (var. viscidulus). Heads (discoid) (1–)2–5(–10) in corymbiform arrays. Involucres 5.5–7(–8) × 8–12 mm. Phyllaries in 3–5 series (sometimes purplish apically), usually glabrous, sometimes with spreading hairs, densely glandular. Ray (pistillate) florets 0. Disc corollas 4–6 mm (throats slightly indurate, not inflated). Cypselae (2–)2.5–3 mm, 2-nerved, glabrous; pappi: outer of setae, inner of 22–30(–35) bristles.

Distribution

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• Legacy Map

Calif.

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Lower Taxa

Erigeron petrophilus var. petrophilus, Erigeron petrophilus var. sierrensis, Erigeron petrophilus var. viscidulus

Key

1	Stems and leaves eglandular or obscurely glandular; nonglandular hairs mostly stiff, straight or curved	Erigeron petrophilus var. viscidulus
1	Stems and leaves densely glandular; nonglandular hairs usually loose, often crinkly	> 2
2	Phyllaries with distinctly expanded, purplish area at apices	Erigeron petrophilus var. petrophilus
2	Phyllaries with apices not purplish and differently colored from proximal portion	Erigeron petrophilus var. sierrensis