Difference between revisions of "Erigeron howellii"
in A. Gray et al., Syn. Fl. N. Amer. 1(2): 209. 1884.
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|accepted_name=Erigeron howellii | |accepted_name=Erigeron howellii | ||
− | |accepted_authority=(A. Gray) A. Gray | + | |accepted_authority=(A. Gray) A. Gray |
|publications={{Treatment/Publication | |publications={{Treatment/Publication | ||
|title=in A. Gray et al., Syn. Fl. N. Amer. | |title=in A. Gray et al., Syn. Fl. N. Amer. | ||
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name=Erigeron howellii | name=Erigeron howellii | ||
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|rank=species | |rank=species | ||
|parent rank=genus | |parent rank=genus | ||
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|publication year=1884 | |publication year=1884 | ||
|special status=Endemic;Conservation concern | |special status=Endemic;Conservation concern | ||
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|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Erigeron | |genus=Erigeron |
Latest revision as of 21:05, 5 November 2020
Perennials, 20–50 cm; rhizomatous, fibrous-rooted, caudices simple, thick. Stems erect to basally ascending, proximally glabrous, distally sparsely to densely strigillose, eglandular. Leaves basal (persistent) and cauline; basal and proximal cauline blades spatulate, 50–200 × 15–45 mm, little reduced distally until distal to midstems, margins entire or shallowly serrate to denticulate, finely ciliate, faces glabrous, eglandular; mid blades ovate to cordate (bases clasping to subclasping). Heads 1. Involucres 6–8 × 12–20 mm. Phyllaries in 2–3(–4) series, glabrous, densely minutely glandular. Ray florets 30–50; corollas white, 13–25 mm (mostly 1.5–3 mm wide), laminae coiling. Disc corollas 4–5 mm. Cypselae 2.5–3 mm, subterete, (4–)5(–6)-nerved, faces sparsely strigose; pappi: outer of setae, inner of 20–30 bristles.
Phenology: Flowering May–Jul.
Habitat: Drainage of Columbia River, steep north-facing slopes with little soil, sometimes in seepage, commonly with Douglas fir
Elevation: (60–)500–1200(–1500) m
Discussion
Of conservation concern.
Selected References
None.