Compilation
Achaetogeron pringlei

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Name

Identification
Isotype of Achaetogeron pringlei Larsen [family COMPOSITAE ] Verified by Not on sheet, Erigeron oreophilus Greenm. [family COMPOSITAE ] (stored under name); Verified by Not on sheet,
Related name
  • Achaetogeron pringlei
  • Erigeron neomexicanus
  • Erigeron oreophilus
Common name
  • Chaparral fleabane, Flora of North America Vol. 20

Flora

Entry for Erigeron oreophilus Greenman [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 20,
Names
Erigeron oreophilus Greenman [family COMPOSITAE], Proc. Amer. Acad. Arts, 41: 257. 1905
Achaetogeron pringlei Larsen [family COMPOSITAE]
Erigeron delphiniifolius Willdenow var. oreophilus (Greenman) Cronquist [family COMPOSITAE]
Treatment Author(s)
Guy L. Nesom
Information
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
jul-aug (summer), sep-nov (fall)
Altitude range
1100–2800(–3100) m;
Distribution
Mexico (Chihuahua).Mexico (Durango).Mexico (Sonora).USA Ariz.USA N.Mex.
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.

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