Eurybia integrifolia

(Nuttall) G. L. Nesom

Phytologia 77: 260. 1995.

Common names: Thickstem aster
IllustratedEndemic
Basionym: Aster integrifolius Nuttall Trans. Amer. Philos. Soc., n. s. 7: 291. 1840
Synonyms: Aster amplexifolius Rydberg
Treatment appears in FNA Volume 20. Treatment on page 368. Mentioned on page 367.

Plants 15–70 cm, usually in clumps, sometimes in large clones, densely long-stipitate-glandular distally; woody, branched, thick, usually short rhizomes or short caudices. Stems 1–3+, straight, stout, glabrous or sparsely hispid proximally, distally ± hispido-villous. Leaves basal and cauline, firm, margins entire, strigoso-ciliate, distal also stipitate-glandular, apices mucronate, faces glabrous or glabrescent to ± densely hispid or strigose (then ± scabrous), particularly on veins, midveins sometimes notably hispido-villous, proximally ± sparsely, distally ± densely stipitate-glandular; basal and proximal cauline long-petiolate (to 100+ mm), petioles ± broadly winged, bases sheathing or auriculate-clasping, blades ovatelanceolate to narrowly elliptic or oblanceolate, 33–180+ × 11–50 mm, bases attenuate, apices acute or obtuse to rounded; mid sessile, blades oblong or oblanceolate to oblong-lanceolate, lanceolate, or lanceovate, 30–140 × 7–27 mm, gradually reduced distally, bases auriculate-clasping, apices usually acute, rarely obtuse; distal (arrays) narrowly ovate to lanceolate, 9–50 × 3–20 mm. Heads 3–41+ in elongate, racemo-corymbiform arrays, branches ascending. Peduncles ± densely long-stipitate-glandular; bracts 0 (–2), densely stipitate-glandular. Involucres campanulate, 8–14 mm, much shorter than pappi. Phyllaries 25–40 in 3–4 series, inner often purplish, oblong-lanceolate (outer) to linear-lanceolate (inner), ± unequal, membranous, bases pale, indurate, sometimes rounded (outer), distally foliaceous (3/4+ in outer, seldom to base, to 1/5 in inner) and wider than bases, margins narrowly scarious (non-foliaceous parts), purplish (at least inner), ciliate and/or stipitate-glandular (along foliaceous parts), apices squarrose, usually acute, sometimes acuminate, faces densely stipitate-glandular. Ray-florets 8–27; corollas violet-purple, 10–15 × 1.2–2.2 mm. Disc-florets 20–50; corollas pale-yellow turning pinkish or purplish, 6–7.8 mm, slightly ampliate, tubes much shorter than cylindric to narrowly funnelform throats, lobes erect, lanceolate, 0.6–0.8 mm. Cypselae greenish stramineous, fusiform-obconic, slightly compressed, 4.2–4.7 mm, ribs 7–10, faces ± densely hirtellous; pappi of stramineous to tawny bristles 7–8 mm, ± equaling disc corollas. 2n = 18.


Phenology: Flowering summer–early fall.
Habitat: Drier meadows, open, moist woodlands, in sedge-willow, sagebrush, Douglas fir, and spruce communities
Elevation: 1600–3200 m

Distribution

V20-848-distribution-map.gif

Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

Eurybia integrifolia is found in mountain ranges bordering the Basin and Range Province, from the Sierra Nevada and Cascade ranges in the west to the Rocky Mountains and Colorado Plateau in the east.

Selected References

None.

Lower Taxa

None.

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... more about "Eurybia integrifolia"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
racemo-corymbiform +
indeterminate +  and determinate +
elongate +
Luc Brouillet +
(Nuttall) G. L. Nesom +
foliaceous +, auriculate-clasping +  and sheathing +
auriculate-clasping +
rounded +  and attenuate +
indurate +
Aster integrifolius +
compound +  and simple +
3 cm30 mm <br />0.03 m <br /> (14 cm140 mm <br />0.14 m <br />) +
oblanceolate;oblong-lanceolate lanceolate or lanceovate +
reduced +
7mm;27mm +
rugulose +  and muricate +
stipitate-glandular +
barbellulate +  and barbellate +
stramineous +  and tawny +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Thickstem aster +
not 2-lipped +  and actinomorphic +
, +  and pale-yellow turning pinkish or purplish +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
ampliate +
0.6 cm6 mm <br />0.006 m <br /> (0.78 cm7.8 mm <br />0.0078 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
7-12(-18)-nerved +
beaked +, 2-ribbed +  and 5-ribbed +
greenish stramineous +
compressed +  and fusiform-obconic +
fertile +  and bisexual +
fertile +  and bisexual +
0.9 cm9 mm <br />0.009 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (2 cm20 mm <br />0.02 m <br />) +
stipitate-glandular +
Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
1600–3200 m +
hirtellous +, stipitate-glandular +, glabrescent +  and more or less densely hispid or strigose +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Drier meadows, open, moist woodlands, in sedge-willow, sagebrush, Douglas fir, and spruce communities +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
oblong-lanceolate +  and linear-lanceolate +
1.4 cm14 mm <br />0.014 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
campanulate +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
petiolate +  and sessile +
cauline +  and basal +
lanceolate +
stipitate-glandular +  and ciliate +
stipitate-glandular +  and hispido-villous +
2-carpellate +
barbellulate +  and barbellate +
pinkish +, yellowish +, tan +, tawny +  and cinnamon +
persistent +
unequal +
long-stipitate-glandular +
Flowering summer–early fall. +
oblong +  and oblanceolate lanceolate or linear +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
7 +  and 10 +
exalbuminous +
Illustrated +  and Endemic +
eglandular +, branched +  and simple +
straight +
ascending +  and erect +
1 +  and 3 +
appendaged +  and truncate +
papillate +  and smooth +
Aster amplexifolius +
Eurybia integrifolia +
species +
cylindric +
ampliate +
sessile +  and long-petiolate +
cauline +  and proximal +
10 cm100 mm <br />0.1 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
long-stipitate-glandular +