Symphyotrichum lanceolatum var. latifolium

(Semple & Chmielewski) G. L. Nesom

Phytologia 77: 285. 1995.

Endemic
Basionym: Aster lanceolatus var. latifolius Semple & Chmielewski Canad. J. Bot. 65: 1060, figs. 15, 16. 1987
Treatment appears in FNA Volume 20. Treatment on page 521. Mentioned on page 520.

Stems stout to slender, glabrous or hairy in lines. Leaf-blades broadly oblanceolate (not much reduced in arrays), margins usually serrate. Heads 3–10+ per branch, if many, not congested on lateral branches, not subtended by foliaceous bracts. Involucres 3.9–5.5 mm. Phyllaries: outer 1.9–3.5 × 0.4–0.6 mm, inner 3–4.9 × 0.4–0.6 mm, outer 1/3–2/3 length of inner. Ray-florets 16–33; corollas white, laminae 4.1–8.6 mm. Disc-florets 13–29; corollas 3.2–5.7 mm, limbs 1.9–3.2 mm, lobes 0.4–1.1 mm. Cypselae 0.8–1.8 mm; pappi 3.1–5.3 mm. 2n = 64.


Phenology: Flowering Jul–Oct.
Habitat: Full sun to partial shade, thickets, edges of wet deciduous woods, margins of streams, ditches
Elevation: 0–800+ m

Distribution

V20-1159-distribution-map.gif

Man., Ont., Ala., Ark., Conn., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.J., N.C., N.Dak., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Vt., Va., W.Va., Wis.

Discussion

Variety latifolium is generally more southern than var. lanceolatum. It is present in the southern Atlantic and Gulf coastal plain states where the latter is absent. In the southern states it is present inland and not on the coastal plains. The report of this variety for southern Quebec remains to be confirmed.

Selected References

None.

Lower Taxa

None.

"/3lengthofinnerphyllaries" is not declared as a valid unit of measurement for this property."thin" is not a number.

scabrous +  and glabrous +
not tailed +, rounded +  and obtuse +
petiolate +  and subpetiolate +
distinct +
1 cm10 mm <br />0.01 m <br /> (8 cm80 mm <br />0.08 m <br />) +
subequal +
scarious +
5mm +  and 20mm +
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† +
(Semple & Chmielewski) G. L. Nesom +
cuneate +  and decurrent +
indurate +
Aster lanceolatus var. latifolius +
subsessile +, sessile +, petiolate +  and subpetiolate +
10 cm100 mm <br />0.1 m <br /> (14 cm140 mm <br />0.14 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1 cm10 mm <br />0.01 m <br /> (8 cm80 mm <br />0.08 m <br />) +
oblanceolate;linear +
reduced +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
10mm;20mm +
rugulose +  and muricate +
linear-oblanceolate +  and lanceolate +
barbellulate +  and barbellate +
sessile +  and petiolate +
not 2-lipped +  and actinomorphic +
at maturity , more or less ampliate , tubes usually shorter +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.57 cm5.7 mm <br />0.0057 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
tan +  and gray +
strigillose +  and glabrous +
compressed +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
Man. +, Ont. +, Ala. +, Ark. +, Conn. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +  and Wis. +
0–800+ m +
strigillose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Full sun to partial shade, thickets, edges of wet deciduous woods, margins of streams, ditches +
disciform +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
campanulate;cylindric +
0.39 cm3.9 mm <br />0.0039 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
2 (?) +  and 5 (?) +
0.41 cm4.1 mm <br />0.0041 m <br /> (0.86 cm8.6 mm <br />0.0086 m <br />) +
0.5mm;1.3mm +
sessile +  and petiolate +
cauline +  and basal +
decurrent +
triangular +
petiolate +  and subpetiolate +
10mm;80mm +
acute +  and obtuse or rounded +
5mm +  and 20mm +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
2-carpellate +
white +  and sordid or tawny +
persistent +
25 +  and 40 +
0.31 cm3.1 mm <br />0.0031 m <br /> (0.53 cm5.3 mm <br />0.0053 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Flowering Jul–Oct. +
spreading +  and appressed +
dilated +, linear-lanceolate +  and linear +
less strongly unequal +  and subequal +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
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 +
stout +  and slender +
appendaged +  and truncate +
papillate +  and smooth +
Aster sect. Heterastrum +  and Aster subg. Symphyotrichum +
Symphyotrichum lanceolatum var. latifolium +
Symphyotrichum lanceolatum +
variety +
funnelform-campanulate +  and cylindric +
ampliate +
150 cm1,500 mm <br />1.5 m <br /> (200 cm2,000 mm <br />2 m <br />) +
30 cm300 mm <br />0.3 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
tree +, shrub +  and subshrub +
lanceolate +  and linear-lanceolate +