Difference between revisions of "Symphyotrichum bracteolatum"

(Nuttall) G. L. Nesom

Phytologia 77: 276. 1995.

Common names: Eaton’s aster
Basionym: Aster bracteolatus Nuttall Trans. Amer. Philos. Soc. n. s. 7: 293. 1840
Synonyms: Aster eatonii (A. Gray) Howell Aster foliaceus var. eatonii A. Gray Symphyotrichum eatonii (A. Gray) G. L. Nesom
Treatment appears in FNA Volume 20. Treatment on page 531. Mentioned on page 469, 475, 477, 534, 537.
m (Corrected accepted name publication from ser. 2 to n. s.)
m (Corrected author name for synonym to G. L Nesom)
 
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|authority=(A. Gray) Nesom
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|authority=(A. Gray) G. L. Nesom
 
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Latest revision as of 19:01, 13 May 2024

Perennials 40–100 cm, cespitose; short-rhizomatous. Stems 1–10+, ascending to erect, glabrous or sparsely puberulent. Leaves thin, margins entire or sometimes serrate, apices acute; basal withering by flowering, petiolate, blades narrowly lanceolate, 60–200 × 10–20 mm, attenuate or cuneate, margins usually entire, sometimes serrate, apices acute, faces glabrous or sparsely puberulent; proximalmost cauline sometimes withering by flowering, sessile, blades narrowly lanceolate, 50–150 × 8–25 mm, bases cuneate, often auriculate, apices acute; distal sessile, blades linear to narrowly lanceolate, 20–120 × 3–20 mm, bases cuneate, often auriculate, apices acute. Heads in racemiform to narrow, paniculiform arrays, branches usually to 10 cm. Peduncles sparsely hairy, bracts linear to lanceolate. Involucres campanulate, 5–8 mm. Phyllaries in 3–5 series, often spreading, oblanceolate (outer) to linear (inner), subequal, outer indurate less than 1/2, bases outer variable, inner scarious, margins entire, scabrous to ciliolate, green zones oblanceolate to elliptic, apices acute to obtuse, often spreading, faces glabrous or sparsely puberulent. Ray florets 20–40; corollas white to pink, laminae 7–15 × 1–2 mm. Disc florets 35–60+; corollas yellow, 4.5–5 mm, lobes triangular, 0.5–0.75 mm. Cypselae brown, cylindric to obovoid, not compressed, 2.5–3.5 mm, 1–2-nerved, faces hairy; pappi white, 5–6 mm. 2n = 16, 32, 48, 64.


Phenology: Flowering Jul–Aug.
Habitat: Moist to wet sunny places, wet thickets, along streams and ditches
Elevation: 500–3100 m

Distribution

V20-1181-distribution-map.gif

Alta., B.C., Sask., Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Nuttall) G. L. Nesom +
Aster bracteolatus +
Eaton’s aster +
Alta. +, B.C. +, Sask. +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, Utah +, Wash. +  and Wyo. +
500–3100 m +
Moist to wet sunny places, wet thickets, along streams and ditches +
Flowering Jul–Aug. +
Aster eatonii +, Aster foliaceus var. eatonii +  and Symphyotrichum eatonii +
Symphyotrichum bracteolatum +
Symphyotrichum sect. Occidentales +
species +