Symphyotrichum concolor

(Linnaeus) G. L. Nesom

Phytologia 77: 278. 1995.

Common names: Eastern silvery aster
IllustratedEndemic
Basionym: Aster concolor Linnaeus Sp. Pl. 2: 874. 1753
Synonyms: Lasallea concolor (Linnaeus) Semple & Brouillet Virgulus concolor (Linnaeus) Reveal & Keener
Treatment appears in FNA Volume 20. Treatment on page 492. Mentioned on page 473, 475, 483, 493.

Perennials, 30–80 cm, cespitose; with cormoid, woody caudices. Stems 1–10+, ascending to erect (light to dark-brown), glabrous or densely canescent distally. Leaves (green to graysih) soft to firm; basal withering by flowering, sessile, blades (1–3-nerved) elliptic-lanceolate, 10–43 × 5–15 mm, bases attenuate, margins usually entire, rarely remotely serrate, piloso-ciliate, apices acute to obtuse, faces silvery silky-pilose to sparsely pilose; proximal cauline withering by flowering, sessile, blades oblanceolate, 20–35 × 5–15 mm, bases rounded, subclasping, margins entire, scabrous to silky-pilose, apices acute to obtuse, cuspidate mucronate, faces ± densely silky; distal sessile, blades usually oblong to lanceolate, rarely ovate, 9–15 × 1.8–5 mm, reduced distally, bases cuneate, margins entire, apices acute, mucronate, faces ± densely silky or sparsely strigose, sometimes glabrate (var. devestitum). Heads in narrow, paniculiform (virgate) arrays (1–3 (–5) per branch). Peduncles densely hairy, bracts becoming linear, grading into phyllaries. Involucres campanulate to narrowly campanulate, 5–7 mm. Phyllaries in 3–5 series, appressed, lanceolate-oblong, strongly unequal, bases (tan) ± indurate, margins scarious proximally, green distally, green zones restricted to apex, obscured by hair, apices usually acute, sometimes acuminate, usually mucronate, sometimes subspinulose, faces ± densely silky. Ray-florets 8–12; corollas rose-purple, rarely white, laminae 4–9 × 1–1.5 mm. Disc-florets (9–) 11–17 (–21); corollas pink turning purple, 4.5–6 mm, tubes shorter than narrowly funnelform throats (thinly puberulent), lobes triangular, 0.4–0.7 mm. Cypselae obovoid, not compressed, 2.5–3.5 mm, 7–10-nerved, faces densely strigose; pappi tan, (3.5–) 4–6 mm.

Distribution

V20-1104-distribution-map.gif

Ala., Del., Fla., Ga., Ky., La., Mass., Md., Miss., N.C., N.J., N.Y., R.I., S.C., Tenn., Va.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Distal cauline leaves and phyllaries moderately to densely silky; e United States Symphyotrichum concolor var. concolor
1 Distal cauline leaves and phyllaries glabrous or sparsely hispido-pilose; panhandle Florida Symphyotrichum concolor var. devestitum
... more about "Symphyotrichum concolor"
not tailed +, rounded +  and obtuse +
subspinulose +, subclasping +  and sessile +
cuspidate +, entire +  and serrate +
distinct +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
silky +, scabrous +  and silky-pilose +
subequal +
scarious +
5mm +  and 15mm +
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) G. L. Nesom +
subclasping +  and sessile +
cuspidate +, entire +  and serrate +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
silky +, scabrous +  and silky-pilose +
cuneate +, mucronate +, acute +  and obtuse +
indurate +
5mm;15mm +
Aster concolor +
subclasping +  and sessile +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
silky +, scabrous +  and silky-pilose +
ovate;usually oblong;lanceolate +
reduced +
1.8mm;5mm +
rugulose +  and muricate +
barbellulate +  and barbellate +
Eastern silvery aster +
not 2-lipped +  and actinomorphic +
pink turning purple +, white +  and rose-purple +
at maturity , more or less ampliate , tubes usually shorter +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
not compressed +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
Ala. +, Del. +, Fla. +, Ga. +, Ky. +, La. +, Mass. +, Md. +, Miss. +, N.C. +, N.J. +, N.Y. +, R.I. +, S.C. +, Tenn. +  and Va. +
subclasping +  and sessile +
cuspidate +, entire +  and serrate +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
strigose +, silky +, glabrate +, scabrous +  and silky-pilose +
mucronate;acute;obtuse +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
disciform +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
campanulate;narrowly campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
2.4 cm24 mm <br />0.024 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1mm;1.5mm +
sessile +  and petiolate +
cauline +  and basal +
soft +  and firm +
decurrent +
triangular +
subclasping +  and sessile +
entire +, cuspidate +  and serrate +
20mm;35mm +
silky +, scabrous +  and silky-pilose +
mucronate +, acute +  and obtuse +
5mm +  and 15mm +
2-carpellate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
persistent +
25 +  and 40 +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
lanceolate-oblong +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
exalbuminous +
Illustrated +  and Endemic +
branched +  and simple +
ascending +  and erect +
1 +  and 10 +
appendaged +  and truncate +
papillate +  and smooth +
Lasallea concolor +  and Virgulus concolor +
Symphyotrichum concolor +
Symphyotrichum subg. Virgulus +
species +
ampliate +
with cormoid caudices +  and rhizomatous +
stipitate-glandular +
30 cm300 mm <br />0.3 m <br /> (80 cm800 mm <br />0.8 m <br />) +
tree +, shrub +  and subshrub +
lanceolate +  and diamond--shaped +