Symphyotrichum lateriflorum

(Linnaeus) Á. Löve & D. Löve

Taxon 31: 359. 1982.

Common names: Calico or one-sided or white woodland or starved aster aster latériflore
IllustratedEndemic
Basionym: Solidago lateriflora Linnaeus Sp. Pl. 2: 879. 1753
Synonyms: Aster lateriflorus (Linnaeus) Britton
Treatment appears in FNA Volume 20. Treatment on page 517. Mentioned on page 467, 469, 495, 501, 509, 515, 5.

Perennials, 20–120 (–150) cm, cespitose; with short, woody, branched caudices, or short-rhizomatous. Stems 1–5+, ascending to erect (± arching, slender, brittle), ± densely pilose or villous to glabrate or glabrous (particularly proximally). Leaves thin, membranous, margins serrate to serrulate, scabridulous, apices acute to acuminate, sometimes caudate, mucronulate, abaxial faces glabrous, midveins usually ± densely pilose to glabrate, rarely glabrous, adaxial scabrous (short-strigose) to glabrate; basal usually withering by flowering, sometimes persisting (new vernal rosettes often developing at flowering), petiolate to subpetiolate (petioles narrowly to ± broadly winged, ciliate, bases ± sheathing), blades oblanceolate, lanceovate or ovate to spatulate or suborbiculate, 5–35 × 7–25 mm, abruptly attenuate, margins crenate-serrate, apices obtuse to rounded or acute; proximal cauline mostly withering by flowering, sessile or subpetiolate (petioles broadly winged), blades usually ovate or elliptic to elliptic-oblanceolate or lanceolate, rarely linear-lanceolate, (30–) 50–100 (–150) × (2–) 10–20 (–35) mm, greatly reduced distally, bases attenuate to cuneate; distal sessile, blades ovate, lanceovate, lance-elliptic, or oblanceolate to lance-linear or linear, 10–150 × 1–30 mm, progressively reduced distally, branch leaves abruptly smaller, bases cuneate, margins sometimes entire. Heads in ample, open, diffuse, ± pyramidal, paniculiform arrays, branches divaricate to long-arching or ± ascending, slender, wiry, secund; usually sessile, sometimes peduncles 0.1–1 cm+, ± pilose, bracts 1–7, linear or subulate to oblong-lanceolate, foliaceous, grading into phyllaries. Involucres cylindro-campanulate, (3.5–) 4–6 (–7) mm. Phyllaries in 3–4 (–6) series, appressed or slightly spreading, oblong-lanceolate or -oblanceoalte (outer) to linear (inner), unequal, bases indurate 1/3–2/3, margins scarious, erose, hyaline or sometimes reddish, ± ciliolate, green zones lanceolate to ± diamond-shaped, apices (outer) acute, callus-pointed, (mid) acute to acuminate, or obtuse, sometimes purplish, abaxial faces glabrous (outer), mid sparsely puberulent. Ray-florets 8–15 (–23); corollas white, rarely pinkish or purplish, laminae (3–) 4–5 (–8) × 0.9–1.2 mm. Disc-florets 8–16 (–20); corollas cream to light yellow turning pink or reddish purple, (2.5–) 3–5 mm, tubes shorter than funnelform-campanulate throats, lobes strongly reflexed, lanceolate, 0.9–1.7 mm. Cypselae gray or tan, oblong-obovoid, sometimes ± compressed, (1.3–) 1.8–2.2 mm, 3–5-nerved, faces sparsely strigillose; pappi white to pinkish, 3–4 mm. 2n = 16, 32, 48.


Phenology: Flowering Aug–Oct.
Habitat: Relatively shaded habitats, dry to humid soils, usually deciduous woodlands (beech–maple, oak–hickory, mixed hardwoods), sometimes conifer woods, sometimes swamp forests (conifer or dediduous), edges of woods, meadows, usually rocky or sandy stream and pond shores, roadsides
Elevation: 0–400 m

Distribution

V20-1151-distribution-map.gif

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

Discussion

Symphyotrichum lateriflorum has been reported in British Columbia as an ephemeral that did not persist. G. L. Nesom (1994b) and J. C. Semple et al. (2002) recognized several varieties within the complex: var. lateriflorum (syn. Aster vimineus Lamarck); var. angustifolium (Wiegand) G. L. Nesom (syn. A. lateriflorus var. angustifolius Wiegand); var. flagellare (Shinners) G. L. Nesom (syn. A. lateriflorus var. flagellaris Shinners, A. lateriflorus var. indutus Shinners); var. hirsuticaule (Lindley ex de Candolle) G. L. Nesom [syn. A. hirsuticaulis Lindley ex de Candolle, A. lateriflorus var. hirsuticaulis (Lindley ex de Candolle) Porter]; var. horizontale (Desfontaines) G. L. Nesom [syn. A. horizontalis Desfontaines, A. lateriflorus var. horizontalis (Desfontaines) Farwell]; var. spatelliforme (E. S. Burgess) G. L. Nesom [syn. A. spatelliformis E. S. Burgess, A. lateriflorus var. spatelliformis (E. S. Burgess) A. G. Jones]; and var. tenuipes (Wiegand) G. L. Nesom (syn. A. lateriflorus var. tenuipes Wiegand, A. acadiensis Shinners). Much genetic and phenotypic variation is encountered within the complex; a thorough study is needed before a coherent taxonomy can be achieved.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

48 +, 32 +  and 16 +
puberulent +  and glabrous +
scabrous +  and glabrate +
not tailed +, rounded +  and obtuse +
petiolate +  and subpetiolate +
persisting +
distinct +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
subequal +
scarious +
7mm +  and 25mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +  and open +
indeterminate +  and determinate +
pyramidal +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Linnaeus) Á. Löve & D. Löve +
subpetiolate +  and sessile +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
cuneate +  and attenuate +
reduced +
indurate +
10mm;20mm +
Solidago lateriflora +
subpetiolate +, sessile +  and petiolate +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
persisting +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
oblanceolate;lance-elliptic;oblanceolate;lance-elliptic;lanceovate;ovate;attenuate;cuneate +
reduced +
10mm;20mm +
rugulose +  and muricate +
subulate +  and oblong-lanceolate +
sessile +, secund +  and wiry +
1 cm10 mm <br />0.01 m <br /> (15 cm150 mm <br />0.15 m <br />) +
smaller +  and reduced +
ascending;long-arching +
slender +
barbellulate +  and barbellate +
short-rhizomatous +  and branched +
sessile +  and petiolate +
Calico or one-sided or white woodland or starved aster +  and aster latériflore +
not 2-lipped +  and actinomorphic +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
, +, cream +  and light yellow turning pink or reddish purple +
at maturity , more or less ampliate , tubes usually shorter +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
tan +  and gray +
strigillose +  and glabrous +
compressed +  and oblong-obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
Man. +, N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +  and Wis. +
0–400 m +
strigillose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Relatively shaded habitats, dry to humid sRelatively shaded habitats, dry to humid soils, usually deciduous woodlands (beech–maple, oak–hickory, mixed hardwoods), sometimes conifer woods, sometimes swamp forests (conifer or dediduous), edges of woods, meadows, usually rocky or sandy stream and pond shores, roadsidesor sandy stream and pond shores, roadsides +
disciform +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
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 /> (0.6 cm6 mm <br />0.006 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
2 (?) +  and 5 (?) +
0.9mm;1.2mm +
sessile +  and petiolate +
cauline +  and basal +
membranous +
decurrent +
lanceolate +
petiolate +  and subpetiolate +
entire +, crenate-serrate +, serrate +  and serrulate +
reddish +  and hyaline +
persisting +
scabridulous +
obtuse +  and rounded or acute +
7mm +  and 25mm +
glabrous +, less densely pilose +  and glabrate +
2-carpellate +
white +  and pinkish +
persistent +
25 +  and 40 +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering Aug–Oct. +
spreading +  and appressed +
oblanceolate or spatulate +  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 +
Illustrated +  and Endemic +
branched +  and simple +
ascending +  and erect +
1 +  and 5 +
appendaged +  and truncate +
papillate +  and smooth +
Aster lateriflorus +
Symphyotrichum lateriflorum +
Symphyotrichum sect. Symphyotrichum +
species +
funnelform-campanulate +
ampliate +
120 cm1,200 mm <br />1.2 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
20 cm200 mm <br />0.2 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
tree +, shrub +  and subshrub +
lanceolate +  and more or less diamond-shaped +