Eurybia conspicua

(Lindley) G. L. Nesom

Phytologia 77: 259. 1995.

Common names: Western showy aster
Endemic
Basionym: Aster conspicuus Lindley in W. J. Hooker, Fl. Bor.-Amer. 2: 7. 1834
Treatment appears in FNA Volume 20. Treatment on page 368. Mentioned on page 366, 367, 369.

Plants 30–100 cm; forming loose clones, short-stipitate-glandular; rhizomes long to short, woody. Stems 1, erect, seldom branched proximally, stout, proximally glabrate to villous and sparsely glandular (sometimes to base), distally glabrate, strongly glandular. Leaves cauline, thick, ample, bases clasping, margins ± revolute, sharply serrate (rarely subentire) with ± mucronate teeth, veins prominent, apices acute to acuminate, mucronate, faces scabrous, adaxial veins villous; proximal cauline deciduous by flowering, winged-subpetiolate to sessile, blades oblanceolate to ovate or obovate, smaller than mid, bases tapering; mid usually sessile, sometimes subsessile, obovate or elliptic, (40–) 58–140 (–180) × (8–) 20–50 (–80) mm, bases cuneate to mostly rounded-subauriculate; distal (in arrays) sessile, ovate to oblanceolate, lanceolate, or elliptic, (8–) 10–60 (–90) × 2–28 (–40) mm, strongly reduced distally. Heads 5–50 in open corymbiform arrays. Peduncles sometimes sparsely hairy, stipitate-glandular; bracts usually 0, sometimes 1–3. Involucres campanulate, 9–12 mm, shorter than pappi. Phyllaries 34–55 in 4–5 series, midnerves translucent, strongly unequal, membranous, bases indurate, dark green distally, margins densely ciliate, apices spreading or ± squarrose, purple (mucro), acute or acuminate (sometimes mucronate), faces glabrous, densely stipitate-glandular; outer ovate or lanceolate; inner oblong-lanceolate, margins hyaline, often purplish distally, scarious. Ray-florets 12–35; corollas blue or violet, (8–) 10–15 × 1.2–2 mm. Disc-florets 48–55; corollas yellow, 9–10 mm, slightly ampliate, tubes narrowly cylindric, slightly longer than narrowly funnelform throats, lobes erect, lanceolate, 0.7–1.3 mm. Cypselae tan, fusiform, ± compressed, 3–4 mm, ribs 8–10, appressed-setose; pappi of cinnamon to pinkish bristles 9–10 mm, about as long as disc corollas. 2n = ca. 108, ca. 122.


Phenology: Flowering summer–fall.
Habitat: Open, mesic conifer (spruce-fir, pine, or aspen-conifer) or aspen woods, from foothills to upper montane zone, mesic to dry meadows, forest openings, in somewhat clayey soils, adapted to spring fires
Elevation: 300–2500 m

Distribution

V20-849-distribution-map.gif

Alta., B.C., Man., Sask., Idaho, Mont., Oreg., S.Dak., Wash., Wyo.

Discussion

Eurybia conspicua is a western boreo-montane taxon; it ranges from the Interior Mountains and Plateaus to the Rocky Mountains, and spreads onto the northern Great Plains in the aspen parklands-southern boreal forests of Canada, barely into western Manitoba. It is disjunct to the Black Hills (South Dakota) and Cypress Hills (Alberta-Saskatchewan). It stops at the Canadian Shield due to soil preferences (A. J. Breitung 1988). This taxon has the highest chromosome number in the genus.

Selected References

None.

Lower Taxa

None.

"[" is not declared as a valid unit of measurement for this property."]" is not declared as a valid unit of measurement for this property."thick" is not a number.

... more about "Eurybia conspicua"
122 +  and 108 +
not tailed +, rounded +  and obtuse +
distinct +
squarrose +  and spreading +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
corymbiform +  and open +
indeterminate +  and determinate +
Luc Brouillet +
(Lindley) G. L. Nesom +
winged-subpetiolate +  and sessile +
dark green +
cuneate +  and mostly rounded-subauriculate +
by flowering , winged-subpetiolate to sessile , blades oblanceolate to ovate or obovate , smaller than mid leaves , bases +
indurate +
Aster conspicuus +
winged-subpetiolate +  and sessile +
tapering;tapering;oblanceolate;ovate or obovate +
by flowering , winged-subpetiolate to sessile , blades oblanceolate to ovate or obovate , smaller than mid leaves , bases +
rugulose +  and muricate +
barbellulate +  and barbellate +
cinnamon +  and pinkish +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Western showy aster +
not 2-lipped +  and actinomorphic +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
yellow +, violet +  and blue +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
ampliate +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
7-12(-18)-nerved +
beaked +, 2-ribbed +  and 5-ribbed +
compressed +  and fusiform +
fertile +  and bisexual +
fertile +  and bisexual +
6 cm60 mm <br />0.06 m <br /> (9 cm90 mm <br />0.09 m <br />) +
2.8 cm28 mm <br />0.028 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
ovate +  and oblanceolate lanceolate or elliptic +
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 2.8 cm28 mm <br />0.028 m <br /> (?) +
Alta. +, B.C. +, Man. +, Sask. +, Idaho +, Mont. +, Oreg. +, S.Dak. +, Wash. +  and Wyo. +
300–2500 m +
stipitate-glandular +  and glabrous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open, mesic conifer (spruce-fir, pine, or aspen-conifer) or aspen woods, from foothills to upper montane zone, mesic to dry meadows, forest openings, in somewhat clayey soils, adapted to spring fires +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
oblong-lanceolate +
1.4 cm14 mm <br />0.014 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
campanulate +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
winged-subpetiolate +  and sessile +
tapering;tapering;oblanceolate;ovate or obovate +
by flowering , winged-subpetiolate to sessile , blades oblanceolate to ovate or obovate , smaller than mid leaves , bases +  and ample +
lanceolate +
purplish +  and hyaline +
subsessile +  and sessile +
14 cm140 mm <br />0.14 m <br /> (18 cm180 mm <br />0.18 m <br />) +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
5.8 cm58 mm <br />0.058 m <br /> (14 cm140 mm <br />0.14 m <br />) +
20mm;50mm +
2-carpellate +
barbellulate +  and barbellate +
pinkish +, yellowish +, tan +, tawny +  and cinnamon +
persistent +
unequal +
stipitate-glandular +  and hairy +
Flowering summer–fall. +
oblong +  and oblanceolate lanceolate or linear +
oblanceolate +  and ovate or obovate +
by flowering , winged-subpetiolate to sessile , blades oblanceolate to ovate or obovate , smaller than mid leaves , bases +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
appressed-setose +
8 +  and 10 +
exalbuminous +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Eurybia conspicua +
species +
mucronate +
slightly longer +
cylindric +
ampliate +
10 cm100 mm <br />0.1 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
short-stipitate-glandular +