Symphyotrichum welshii

(Cronquist) G. L. Nesom

Phytologia 77: 294. 1995.

Common names: Welsh’s aster
EndemicConservation concern
Basionym: Aster welshii Cronquist in A. Cronquist et al., Intermount. Fl. 5: 291, fig. p. 293. 1994
Treatment appears in FNA Volume 20. Treatment on page 523. Mentioned on page 468, 477, 501.

Perennials, 30–100 cm colonial; rhizomes shallow and long, often relatively thick (those of the season each producing a distal rosette near the parent plant). Stems 1–2, ascending to erect (sometimes lax, sometimes reddish), glabrous or sparsely strigoso-villosulous distally (arrays). Leaves (adaxially green, abaxially pale green, sometimes glaucous) thin (proximal) to stiff (distal), margins serrulate (proximal) or entire or nearly so, ± revolute, scabrous, apices mucronulate or sometimes callous-pointed, faces glabrous; basal withering by flowering, petiolate (petioles narrowly winged, sheathing), blades oblanceolate to spatulate, 10–40+ × 4–9+ mm, bases attenuate, margins entire, apices obtuse; proximal cauline withering by flowering, sessile or winged-petiolate, blades lanceolate to oblanceolate, 50–150 × 8–11 mm, bases slightly clasping, margins sparsely serrulate, apices acute; distal sessile, blades linear to linear-lanceolate, 50–130 × 4–6 mm, gradually reduced distally, bases ± clasping, apices acute. Heads in open, slender, leafy, paniculiform or racemiform arrays, branches ascending. Peduncles 0.5–2 cm, scabro-villosulous, bracts linear, scabro-ciliolate. Involucres cylindro-campanulate, 4–7 mm. Phyllaries in 3–4 series, lanceolate (outer) to linear (inner), ± unequal, bases indurate, margins hyaline, erose, distally scabro-ciliolate to ciliolate, green zones ± foliaceous (outer) or lanceolate, apices acute to acuminate, sometimes purplish, faces glabrous. Ray-florets 18–25; corollas pink to white, laminae 9–12 × 0.8–1.5 mm. Disc-florets 23–60; corollas pale-yellow, 3.8–6.4 mm, tubes shorter than funnelform throats, lobes narrowly triangular, 0.4–0.8 mm. Cypselae pinkish tan (nerves stramineous), obovoid, ± compressed, 0.8–1.6 mm, 3–5-nerved, faces sparsely strigillose; pappi white, 2.8–5.3 mm. 2n = 16.


Phenology: Flowering Aug–Oct.
Habitat: Wet soils in dry areas, hanging gardens, seeps, wet ledges, stream banks
Elevation: 1300–2300 m

Distribution

V20-1164-distribution-map.gif

Ariz., Idaho, Mont., Utah, Wyo.

Discussion

Of conservation concern.

Selected References

None.

Lower Taxa

None.

"thin" is not a number."thick" is not a number.

... more about "Symphyotrichum welshii"
not tailed +, rounded +  and obtuse +
winged-petiolate +, sessile +  and petiolate +
serrulate +  and entire +
distinct +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
subequal +
scarious +
8mm +  and 11mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
racemiform +, paniculiform +, leafy +  and open +
indeterminate +  and determinate +
slender +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Cronquist) G. L. Nesom +
winged-petiolate +, sessile +  and petiolate +
serrulate +  and entire +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
acute +, lanceolate +  and oblanceolate +
indurate +
8mm;11mm +
Aster welshii +
winged-petiolate +, sessile +  and petiolate +
5 cm50 mm <br />0.05 m <br /> (13 cm130 mm <br />0.13 m <br />) +
linear;linear-lanceolate +
reduced +
4mm;6mm +
rugulose +  and muricate +
scabro-ciliolate +
barbellulate +  and barbellate +
sessile +  and petiolate +
Welsh’s aster +
not 2-lipped +  and actinomorphic +
pale-yellow +, pink +  and white +
at maturity , more or less ampliate , tubes usually shorter +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.64 cm6.4 mm <br />0.0064 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
strigillose +  and glabrous +
compressed +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Idaho +, Mont. +, Utah +  and Wyo. +
1300–2300 m +
strigillose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Wet soils in dry areas, hanging gardens, seeps, wet ledges, stream banks +
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 />) +
cylindro-campanulate +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
2 (?) +  and 5 (?) +
0.8mm;1.5mm +
sessile +  and petiolate +
cauline +  and basal +
decurrent +
reflexed;spreading;erect +
triangular +
winged-petiolate +, sessile +  and petiolate +
serrulate +, entire +  and nearly +
50mm;150mm +
distally scabro-ciliolate +  and ciliolate +
acute +, lanceolate +  and oblanceolate +
8mm +  and 11mm +
2-carpellate +
persistent +
25 +  and 40 +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.53 cm5.3 mm <br />0.0053 m <br />) +
scabro-villosulous +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering Aug–Oct. +
lanceolate +  and linear +
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 +
Endemic +  and Conservation concern +
branched +  and simple +
ascending +  and erect +
1 +  and 2 +
appendaged +  and truncate +
papillate +  and smooth +
Aster sect. Heterastrum +  and Aster subg. Symphyotrichum +
Symphyotrichum welshii +
Symphyotrichum sect. Symphyotrichum +
species +
funnelform-campanulate +  and cylindric +
ampliate +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
tree +, shrub +  and subshrub +
lanceolate +