Symphyotrichum campestre

(Nuttall) G. L. Nesom

Phytologia 77: 276. 1995.

Common names: Western meadow aster
Endemic
Basionym: Aster campestris Nuttall Trans. Amer. Philos. Soc., n. s. 7: 293. 1840
Synonyms: Aster bloomeri A. Gray Aster campestris var. bloomeri (A. Gray) A. Gray Symphyotrichum campestre var. bloomeri (A. Gray) G. L. Nesom Virgulus campestris
Treatment appears in FNA Volume 20. Treatment on page 484. Mentioned on page 471, 483.

Perennials, 10–40 cm, colonial or cespitose; long-rhizomatous. Stems 1–5+, ascending to erect (light to dark-brown), proximally glabrous, distally strigose, stipitate-glandular. Leaves (light green) firm, margins entire, scabrous; basal sometimes persistent, sessile, blades (1–3-nerved) linear-oblanceolate, 10–30 × 4–10 mm, bases attenuate, apices obtuse, mucronate, faces glabrate to sparsely scabrous; proximal cauline withering by flowering, sessile, blades (3-nerved) narrowly oblanceolate, 20–80 × 2–8 mm, bases cuneate, apices obtuse to acute, mucronulate or white-spinulose, faces glabrous or moderately short-strigose, stipitate-glandular; distal sessile, blades linear-oblanceolate to lanceolate or oblong (distally), 20–50 × 2–5 mm, ± reduced distally, bases ± clasping to cuneate, apices acute, mucronulate, faces glabrous or moderately short-strigose, stipitate-glandular. Heads 1–10 (–30), borne singly or in paniculiform arrays, branches ascending. Peduncles sparsely to moderately short-strigose, moderately stipitate-glandular, bracts ± ascending, linear to narrowly-lanceolate. Involucres campanulate to cylindro-campanulate, 5.5–8 mm. Phyllaries in 3–4 series, linear to lanceolate, subequal to unequal, bases ± indurate, margins scarious, green zones covering distal portion, apices acute to acuminate, outer ± foliaceous, spreading to reflexed, faces glabrate, sparsely to densely stipitate-glandular. Ray-florets 15–31; corollas violet, laminae (5–) 6–15 × 1–2 mm. Disc-florets 25–40; corollas yellow, 4.5–6 mm, lobes triangular, 0.4–0.8 mm. Cypselae light-brown, sometimes translucent reddish-brown between ribs, narrowly obovoid, ± compressed, 2–2.5 mm, 3–4-nerved (faint), moderately strigose on ribs; pappi tawny, 3.8–6 mm. 2n = 10.


Phenology: Flowering Aug–Oct.
Habitat: Open, often dry, disturbed, rocky and sandy soils near ponds and streams, dry grass meadows, open pine-douglas fir forests, plains to montane zones
Elevation: 1500–2500 m

Distribution

V20-1089-distribution-map.gif

Alta., B.C., Calif., Colo., Idaho, Mont., Nev., Oreg., Wash., Wyo.

Discussion

Two poorly defined varieties of Symphyotrichum campestre have been described. Variety campestre has glabrous or sparsely strigose leaves and occurs in southern British Columbia, Colorado, Idaho, Montana, Nevada, Oregon, Washington, and Wyoming. Bloomer’s Aster, var. bloomeri, has moderately strigose leaves and occurs in California, Nevada, and Oregon. The varieties are not sufficiently distinct to warrant recognition. Symphyotrichum ×columbianum (Piper) G. L. Nesom (syn. Aster columbianus Piper, A. multiflorus Aiton var. columbianus (Piper) S. F. Blake, Virgulus ×columbianus (Piper) Reveal & Keener) is the hybrid between S. campestre and S. ericoides subsp. pansum.

Selected References

None.

Lower Taxa

None.
... more about "Symphyotrichum campestre"
not tailed +, rounded +  and obtuse +
distinct +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
short-strigose +  and glabrous +
subequal +
scarious +
2mm +  and 8mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Nuttall) G. L. Nesom +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
short-strigose +  and glabrous +
cuneate +, obtuse +  and acute mucronulate or white-spinulose +
indurate +
2mm;8mm +
Aster campestris +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
flowering +  and withering +
stipitate-glandular +, short-strigose +  and glabrous +
linear-oblanceolate;lanceolate or oblong +
reduced +
2mm;5mm +
rugulose +  and muricate +
linear +  and narrowly-lanceolate +
barbellulate +  and barbellate +
Western meadow aster +
not 2-lipped +  and actinomorphic +
yellow +  and violet +
at maturity , more or less ampliate , tubes usually shorter +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
translucent reddish-brown +  and light-brown +
compressed +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +, B.C. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Wash. +  and Wyo. +
1500–2500 m +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
glabrate +  and sparsely densely stipitate-glandular +
obtuse;acute mucronulate or white-spinulose +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open, often dry, disturbed, rocky and sandy soils near ponds and streams, dry grass meadows, open pine-douglas fir forests, plains to montane zones +
disciform +  and radiate +
in paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
campanulate;cylindro-campanulate +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
decurrent +
triangular +
not +  and hyaline +
ciliate +  and scabrous +
entire +, crenate +  and serrate +
spreading +  and reflexed +
2-carpellate +
persistent +
25 +  and 40 +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
stipitate-glandular +  and short-strigose +
Flowering Aug–Oct. +
linear +  and lanceolate +
subequal +  and unequal +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
exalbuminous +
branched +  and simple +
ascending +  and erect +
1 +  and 5 +
appendaged +  and truncate +
papillate +  and smooth +
Aster bloomeri +, Aster campestris var. bloomeri +, Symphyotrichum campestre var. bloomeri +  and Virgulus campestris +
Symphyotrichum campestre +
Symphyotrichum subg. Virgulus +
species +
at maturity , more or less ampliate , tubes usually shorter +
ampliate +
sessile +  and long-rhizomatous +
cespitose +  and colonial +
stipitate-glandular +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
tree +, shrub +  and subshrub +
lanceolate +  and diamond--shaped +