Erigeron breweri

Perennials, 7–75 cm; taprooted (taproots usually not collected, often weakly developed), roots and caudices woody, branches rhizomelike (3–15 cm; fibrous-rooted), relatively slender, leafless, ascending. Stems usually ascending, sometimes prostrate to procumbent or decumbent (var. jacinteus) (often purple, distal branches stiff, spreading-ascending), hispid (hairs spreading-deflexed, 0.1–0.4 mm), mostly eglandular. Leaves cauline; (ascending) blades narrowly oblong-lanceolate to narrowly obovate, 10–40 × 2–5 mm, margins entire, relatively evenly spaced and sized, hispid, mostly eglandular. Heads 1 or 2–5(–10) in loosely corymbiform arrays. Involucres mostly 4–6 × 9–14 mm. Phyllaries in 3–5 series (all but outermost with stramineous margins and distal, greenish-herbaceous, narrowly rhomboid areas), strigoso- to hispido-hirsute or essentially glabrous, densely minutely glandular. Ray florets 20–62; corollas white or pink, often drying blue, 4–7 mm, laminae weakly coiling. Disc corollas 3.5–5.5 mm (throats slightly indurate, not inflated). Cypselae 2–3 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of (15–)20–35(–50) bristles.

Distribution

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• Legacy Map

Calif., Nev.

Discussion

Varieties 5 (5 in the flora).

Erigeron breweri is treated as a member of E. sect. Linearifolii in G. L. Nesom (1992b), where all of the varieties are mapped in detail.

Selected References

None.

Lower Taxa

Erigeron breweri var. bisanctus, Erigeron breweri var. breweri, Erigeron breweri var. covillei, Erigeron breweri var. jacinteus, Erigeron breweri var. porphyreticus

Key

1	Phyllaries glabrous or sparsely hairy, densely glandular	> 2
1	Phyllaries strigoso- to hispido-hirsute, sometimes slightly glandular	> 3
2	Plants usually 12–40 or 30–60 cm; stems ascending-erect; leaves usually 15–35 mm	Erigeron breweri var. breweri
2	Plants 7–15 cm; stems prostrate to procumbent or decumbent; leaves 5–12 mm	Erigeron breweri var. jacinteus
3	Plants 20–30 cm; stems often wiry and brittle; phyllaries hispido-hirsute (hairs translucent, spreading, stiff, relatively thick-based), glandular	Erigeron breweri var. porphyreticus
3	Plants (30–)40–75 cm; stems not wiry or brittle; phyllaries strigoso- or hispido-hirsute (hairs ascending to ascending-appressed, white), eglandular	> 4
4	Phyllaries strigoso-hirsute (hairs relatively thin-based, ascending-appressed, gradually and slightly reduced in density from outer to inner phyllaries), eglandular	Erigeron breweri var. bisanctus
4	Phyllaries hispido-hirsute (hairs relatively thick-based, ascending, dense on outermost phyllaries, much less so on mid and inner), eglandular	Erigeron breweri var. covillei