Symphyotrichum molle

(Rydberg) G. L. Nesom

Phytologia 77: 286. 1995.

Common names: Soft aster
Endemic
Basionym: Aster mollis Rydberg Bull. Torrey Bot. Club 28: 22. 1901
Treatment appears in FNA Volume 20. Treatment on page 535. Mentioned on page 472.

Perennials, 30–60 cm, colonial; long-rhizomatous. Stems 1–5+, ascending to erect, densely puberulent to lanate, especially distally. Leaves thin, margins entire, apices acute, faces densely lanate-puberulent; basal often withering by flowering, subpetiolate, blades oblanceolate, 15–50 × 5–20 mm, bases cuneate, margins entire, apices acute, faces densely lanate; proximal cauline sessile or subpetiolate, blades oblanceolate, 50–150 × 10–25 mm, bases slightly clasping, rarely auriculate; distal sessile, blades lanceolate, 30–100 × 10–20 mm, reduced distally, bases tapered, ± auriculate, apices acute. Heads in corymbiform to paniculiform arrays, branches to 20 cm. Peduncles densely cinereous to lanate, bracts 0–3, lanceolate to narrowly ovate. Involucres campanulate, 7–9 mm. Phyllaries in 4–5 (–6) series, squarrose, oblong to oblanceolate, unequal, bases of outer indurate less than 1/3, margins entire, green zones oblong-linear to oblanceolate, apices acute or obtuse (sometimes minutely mucronate), faces densely puberulent to lanate. Ray-florets 20–35; corollas violet, laminae 12–20 × 1–2 mm. Disc-florets 35–70; corollas yellow, 5–6.5 mm, lobes triangular, 0.5–1 mm. Cypselae brown, cylindric to obovoid, not compressed, 2.5–3.5 mm, 4–5-nerved, faces hairy; pappi whitish, 5–7 mm. 2n = 32.


Phenology: Flowering Aug.
Habitat: Dry montane meadows
Elevation: 2000–3000 m

Discussion

Symphyotrichum molle is known only from the Big Horn Mountains of Wyoming. Because of its densely hairy leaves, stems, and involucres, it was compared by its author with S. jessicae, a narrow endemic of southeastern Washington and adjacent Idaho.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

... more about "Symphyotrichum molle"
not tailed +, rounded +  and obtuse +
subpetiolate +
distinct +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
subequal +
scarious +
5mm +  and 20mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Rydberg) G. L. Nesom +
subpetiolate +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
auriculate +, tapered +, acute +, cuneate +  and oblanceolate +
indurate +
5mm;20mm +
Aster mollis +
subpetiolate +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
lanceolate;oblanceolate;acute;cuneate;oblanceolate +
reduced +
10mm;20mm +
rugulose +  and muricate +
lanceolate +  and narrowly ovate +
barbellulate +  and barbellate +
sessile +  and petiolate +
Soft aster +
not 2-lipped +  and actinomorphic +
yellow +  and violet +
at maturity , more or less ampliate , tubes usually shorter +
0.5 cm5 mm <br />0.005 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
strigillose +  and glabrous +
not compressed +, cylindric +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
2000–3000 m +
subpetiolate +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
hairy +, densely puberulent +  and lanate +
acute;cuneate;oblanceolate +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry montane meadows +
disciform +  and radiate +
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 +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
12mm;20mm +
2 (?) +  and 5 (?) +
sessile +  and petiolate +
cauline +  and basal +
decurrent +
triangular +
not +  and hyaline +
15mm;50mm +
acute +, cuneate +  and oblanceolate +
5mm +  and 20mm +
2-carpellate +
persistent +
25 +  and 40 +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Flowering Aug. +
oblong +  and oblanceolate +
subpetiolate +  and sessile +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
exalbuminous +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.1mm;0.2mm +
branched +  and simple +
ascending +  and erect +
1 +  and 5 +
appendaged +  and truncate +
papillate +  and smooth +
Aster sect. Heterastrum +  and Aster subg. Symphyotrichum +
Symphyotrichum molle +
Symphyotrichum sect. Occidentales +
species +
funnelform-campanulate +  and cylindric +
at maturity , more or less ampliate , tubes usually shorter +
ampliate +
30 cm300 mm <br />0.3 m <br /> (60 cm600 mm <br />0.6 m <br />) +
tree +, shrub +  and subshrub +
oblong-linear +  and oblanceolate +