Symphyotrichum laeve

(Linnaeus) Á. Löve & D. Löve

Taxon 31: 359. 1982.

Common names: Smooth aster aster lisse
Basionym: Aster laevis Linnaeus Sp. Pl. 2: 876. 1753
Treatment appears in FNA Volume 20. Treatment on page 508. Mentioned on page 473, 475, 500, 510, 521, 537.

Perennials (15–) 20–70 (–120) cm, cespitose; stoutly short-rhizomatous, with thick, woody caudices or a few, long rhizomes. Stems 1–5+, erect (straight, glaucous, sometimes reddish proximally), glabrous, sometimes sparsely hirsute distally. Leaves (glaucous) thick, firm, ± fleshy, margins crenate-serrate or serrulate or entire, scabridulous, apices mucronulate, faces glabrous; basal usually withering by flowering or sometimes persistent (var. purpuratum), petiolate (petioles ± winged, bases dilated, sheathing), blades spatulate or oblong to ovate or lanceolate-ovate, 30–200 × 10–25 (–30) mm, bases attenuate or cuneate to rounded, margins crenate-serrate to serrulate, apices acute to obtuse or rounded; proximal cauline often withering by flowering, petiolate or subsessile or sessile (petioles narrowly to broadly winged, clasping), blades ovate or oblong-ovate to lanceolate or linear-lanceolate, sometimes ± panduriform, (40–) 80–150 (–180) × (10–) 20–45 mm, bases attenuate to rounded or ± shallowly auriculate-clasping, margins entire or shallowly crenate-serrate, minutely scabrous, apices acute or obtuse, callus-pointed; distal sessile, blades lanceovate or lanceolate to linear, 7–45 × 1–14 mm, progressively reduced distally (abruptly so in arrays), bases auriculate and ± clasping to rounded, margins entire. Heads in broad, sometimes ± flat-topped, paniculiform arrays, branches stiffly ascending (rarely arching), leafy with small, gradually reduced branch leaves. Peduncles 0.2–6+ cm, glaucous, glabrous or puberulent in lines, bracts 3–6, densely spaced, subulate or linear-lanceolate to linear, subclasping, apices sometimes purplish, grading into phyllaries. Involucres campanulate to cylindro-campanulate, (4.2–) 5–7 (–8) mm. Phyllaries in 4–6 series, appressed, subulate or lanceolate (outer) to oblong-lanceolate or linear-lancolate or oblanceolate, unequal (sometimes appearing subequal), bases indurate 1/2–3/4, margins scarious, erose, hyaline, ciliolate distally, green zones mostly diamond-shaped to ± lanceolate (some inner, or most in var. geyeri), apices acute to acuminate, sometimes ± obtuse, red-mucronate or apiculate, faces glabrous. Ray-florets (11–) 13–23 (–34); corollas usually pale to dark blue or purple, seldom white, laminae (6–) 7.2–11.3 (–14.6) × 1.5–2.5 mm. Disc-florets (17–) 19–33 (–43); corollas yellow turning purplish red, 3.5–6.1 mm, tubes slightly shorter than funnelform throats, lobes triangular, (0.4–) 0.6–1 mm. Cypselae deep purple to brown, oblong-obovoid, compressed, 2–3.5 mm, 4–5-nerved, faces glabrous or glabrate; pappi tawny to red or rose-tinged, 5–7 mm.

Distribution

V20-1133-distribution-map.gif

Alta., B.C., Man., N.B., Ont., Que., Sask., Yukon, Ala., Ark., Calif., Colo., Conn., D.C., Del., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Md., Mich., Minn., Miss., Mo., Mont., N.C., N.Dak., N.H., N.J., N.Mex., N.Y., Nebr., Nev., Ohio, Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Va., Vt., W.Va., Wash., Wis., Wyo., ne Mexico, in other areas of Mexico, Central America, Europe

Discussion

Varieties 4 (4 in the flora).

Selected References

None.

Key

1 Leaves lanceolate to ovate, conspicuously auriculate-clasping, lengths less than 5 times widths > 2
1 Leaves linear-lanceolate to linear, slightly auriculate-clasping, lengths often 5 times widths > 3
2 Phyllaries strongly unequal, green apical zones diamond-shaped Symphyotrichum laeve var. laeve
2 Phyllaries unequal, green apical zones lanceolate Symphyotrichum laeve var. geyeri
3 Basal leaves withering by flowering, cauline linear-lanceolate Symphyotrichum laeve var. concinnum
3 Leaves mostly basal and proximal at flowering, mostly linear Symphyotrichum laeve var. purpuratum

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

... more about "Symphyotrichum laeve"
not tailed +, rounded +  and obtuse +
auriculate-clasping +
crenate-serrate +  and entire +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
persistent +
distinct +
3 cm30 mm <br />0.03 m <br /> (20 cm200 mm <br />0.2 m <br />) +
crenate-serrate to serrulate +
subequal +
scarious +
10mm +  and 25mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Linnaeus) Á. Löve & D. Löve +
sessile +, subsessile +  and petiolate +
crenate-serrate +  and entire +
15 cm150 mm <br />0.15 m <br /> (18 cm180 mm <br />0.18 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
persistent +
8 cm80 mm <br />0.08 m <br /> (15 cm150 mm <br />0.15 m <br />) +
rounded +, auriculate +  and attenuate +
crenate-serrate to serrulate +
indurate +
20mm;45mm +
Aster laevis +
sessile +, subsessile +  and petiolate +
15 cm150 mm <br />0.15 m <br /> (18 cm180 mm <br />0.18 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
persistent +
0.7 cm7 mm <br />0.007 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
lanceolate;linear +
crenate-serrate to serrulate +
reduced +
1mm;14mm +
rugulose +  and muricate +
linear-lanceolate +  and linear +
reduced +  and small +
barbellulate +  and barbellate +
sessile +  and petiolate +
Smooth aster +  and aster lisse +
not 2-lipped +  and actinomorphic +
yellow turning purplish red +, white +, usually pale +  and dark blue or purple +
at maturity , more or less ampliate , tubes usually shorter +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.61 cm6.1 mm <br />0.0061 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
purple +  and brown +
strigillose +  and glabrous +
compressed +  and oblong-obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +, B.C. +, Man. +, N.B. +, Ont. +, Que. +, Sask. +, Yukon +, Ala. +, Ark. +, Calif. +, Colo. +, Conn. +, D.C. +, Del. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, N.C. +, N.Dak. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, Nebr. +, Nev. +, Ohio +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Va. +, Vt. +, W.Va. +, Wash. +, Wis. +, Wyo. +, ne Mexico +, in other areas of Mexico +, Central America +  and Europe +
glabrate +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
disciform +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
campanulate;cylindro-campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1.13 cm11.3 mm <br />0.0113 m <br /> (1.46 cm14.6 mm <br />0.0146 m <br />) +
7.2mm;11.3mm +
2 (?) +  and 5 (?) +
1.5mm;2.5mm +
sessile +  and petiolate +
cauline +  and basal +
fleshy +  and firm +
decurrent +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
reflexed;spreading;erect +
triangular +
entire +, crenate-serrate +  and serrulate +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
persistent +
30mm;200mm +
scabridulous +
obtuse +, acute +  and obtuse or rounded +
crenate-serrate to serrulate +
10mm +  and 25mm +
2-carpellate +
tawny +  and red or rose-tinged +
persistent +
25 +  and 40 +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
puberulent +, glabrous +  and glaucous +
0.2 cm2 mm <br />0.002 m <br /> (6 cm60 mm <br />0.06 m <br />) +
oblanceolate +, linear-lancolate +, lanceolate +  and oblong-lanceolate +
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 +
1 +  and 5 +
appendaged +  and truncate +
papillate +  and smooth +
Aster sect. Heterastrum +  and Aster subg. Symphyotrichum +
Symphyotrichum laeve +
Symphyotrichum sect. Symphyotrichum +
species +
funnelform-campanulate +  and cylindric +
ampliate +
70 cm700 mm <br />0.7 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
20 cm200 mm <br />0.2 m <br /> (70 cm700 mm <br />0.7 m <br />) +
tree +, shrub +  and subshrub +
mostly diamond-shaped +  and more or less lanceolate +