Erigeron pinnatisectus

(A. Gray) A. Nelson

Bull. Torrey Bot. Club 26: 246. 1899.

Common names: Feather-leaf fleabane
Basionym: Erigeron compositus var. pinnatisectus A. Gray Notes Compositae, 90. 1880
Treatment appears in FNA Volume 20. Treatment on page 310. Mentioned on page 262.

Perennials, 4–11 cm; taprooted, caudex branches usually relatively thick, woody. Stems erect, sparsely to moderately hispidulous and minutely glandular, sometimes merely glandular. Leaves mostly basal and proximal (persistent); basal blades spatulate to obovate (often folding), 20–40(–50) × 5–10 mm, margins pinnatifid (lobes linear), faces usually glabrate, sometimes sparsely hirsute, usually minutely glandular; cauline blades mostly linear, abruptly reduced distally or nearly absent, margins entire, usually coarsely ciliate. Heads 1. Involucres 5.5–8 × 9–13 mm. Phyllaries in 3–5 series, sparsely hispidulous to hirsuto-villous, minutely glandular. Ray florets 40–70; corollas usually light blue, sometimes slightly purplish, drying bluish or fading lighter, 7–12 mm, laminae reflexing. Disc corollas 3.8–4.5 mm. Cypselae 1.5–1.8 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner (persistent) of 25–30 bristles, with outer setae.

Phenology: Flowering late Jun–Aug.
Habitat: Bluffs and ledges, moraines, subalpine and alpine meadows
Elevation: 2700–3700(–4000) m


Selected References


Lower Taxa

... more about "Erigeron pinnatisectus"
Guy L. Nesom +
(A. Gray) A. Nelson +
Erigeron compositus var. pinnatisectus +
Feather-leaf fleabane +
Colo. +, N.Mex. +  and Wyo. +
2700–3700(–4000) m +
Bluffs and ledges, moraines, subalpine and alpine meadows +
Flowering late Jun–Aug. +
Bull. Torrey Bot. Club +
Illustrated +  and Endemic +
Achaetogeron +  and Trimorpha +
Erigeron pinnatisectus +
Erigeron +
species +