Erigeron oreophilus

Greenman

Proc. Amer. Acad. Arts 41: 257. 1905.

Common names: Chaparral fleabane
Synonyms: Achaetogeron pringlei Larsen Erigeron delphiniifolius var. oreophilus (Greenman) Cronquist
Treatment appears in FNA Volume 20. Treatment on page 278. Mentioned on page 262, 334.

Perennials, (8–)25–90 cm; taprooted, caudices woody. Stems erect, sparsely hirsuto-villous (hairs 0.6–2 mm) or glabrous, densely stipitate-glandular (at least on distal 1/2, glands relatively large, capitate). Leaves basal (sometimes withering by flowering) and cauline; basal blades 15–60 × 8–37 mm, cauline gradually reduced distally, margins deeply pinnatifid, lobes 2–4(–5) pairs, faces usually glabrous, stipitate-glandular. Heads (1–)5–25(–50) in loosely corymbiform arrays. Involucres 4.5–5.5 × 8–12 mm. Phyllaries in 3–4 series, glabrous or sparsely hirsute, densely stipitate-glandular. Ray florets 75–130; corollas white, 8–14 mm, laminae reflexing. Disc corollas 2.8–3.5 mm. Cypselae 1–1.2 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner (readily falling) of (8–)10–12 bristles. 2n = 18.


Phenology: Flowering Jul–Oct(–Nov).
Habitat: Open, rocky habitats, cliff ledges or crevices, grassland, chaparral, oak, pine, pine-fir
Elevation: 1100–2800(–3100) m

Distribution

V20-562-distribution-map.gif

Ariz., N.Mex., Mexico (Chihuahua, Durango, Sonora).

Discussion

Erigeron oreophilus is similar to E. neomexicanus in its perennial habit, typically pinnatifid leaves, white, reflexing rays, and 10–12 readily falling pappus bristles; it has a vestiture of dense, viscid, stipitate glands and sparse, spreading, nonglandular hairs.

Selected References

None.

Lower Taxa

None.
... more about "Erigeron oreophilus"
Guy L. Nesom +
Greenman +
Chaparral fleabane +
Ariz. +, N.Mex. +, Mexico (Chihuahua +, Durango +  and Sonora). +
1100–2800(–3100) m +
Open, rocky habitats, cliff ledges or crevices, grassland, chaparral, oak, pine, pine-fir +
Flowering Jul–Oct(–Nov). +
Proc. Amer. Acad. Arts +
Achaetogeron pringlei +  and Erigeron delphiniifolius var. oreophilus +
Erigeron oreophilus +
Erigeron +
species +