Symphyotrichum pratense

(Rafinesque) G. L. Nesom

Phytologia 77: 290. 1995.

Common names: Barrens silky aster
Endemic
Basionym: Aster pratensis Rafinesque Fl. Ludov., 67. 1817 (as pratense)
Synonyms: Aster phyllolepis Torrey & A. Gray Aster sericeus var. microphyllus de Candolle Symphyotrichum sericeum var. microphyllum (de Candolle) Wunderlin and B. F. Hansen Virgulus pratensis (Rafinesque) Reveal & Keener
Treatment appears in FNA Volume 20. Treatment on page 493. Mentioned on page 473, 474, 483.

Perennials, 40–60 cm, cespitose, eglandular; with cormoid, woody caudices. Stems 5–10+, ascending to erect (brown), glabrous or sparsely strigose distally. Leaves (grayish green) firm, margins entire; basal withering by flowering, sessile, blades (1–3 nerved) elliptic-lanceolate, 20–40 × 10–20 mm, bases attenuate, margins usually entire, rarely remotely serrate, piloso-ciliate, apices acute to obtuse, faces piloso-scabrous; proximal cauline withering by flowering, sessile, blades oblanceolate, 20–30 × 5–13 mm, reduced distally, bases rounded, subclasping, margins entire, scrabrous, apices acute to obtuse, cuspidate-mucronate, faces glabrous or moderately strigose or ± scabrous; distal sessile, blades oblong-lanceolate, 15–25 × 4–6 mm, bases cuneate, margins entire, apices acute, white-spinulose, faces glabrate to moderately strigose or ± scabrous. Heads in open, paniculiform arrays (1–5+ per branch). Peduncles glabrous or sparsely strigose, bracts oblong-lanceolate, grading into phyllaries. Involucres narrowly campanulate, 6–11 mm. Phyllaries in 3–4 series, outer broadly lanceolate, flaring distally, inner linear-lanceolate, subequal, outer foliceous, bases (tan) ± indurate, margins long-piloso-ciliate, green zones foliaceous (outer), apices sometimes purplish, acute (outer) to acuminate (inner), faces glabrous or sparsely short-pilose. Ray-florets 13–15 (–36); corollas rose-purple, laminae 8–13 × 1–2 mm. Disc-florets 16–34 (–48); corollas pink turning purple, 4.5–7.5 mm, tubes shorter than narrowly funnelform throats (sometimes thinly puberulent), lobes triangular, 8–13 mm. Cypselae tan to light-brown, obovoid, not compressed, ± 3 mm, 5–8-nerved, faces glabrous; pappi tan, 3.5–6 mm. 2n = 10, 20.


Phenology: Flowering Oct–Nov.
Habitat: Prairies, oak woodlands, pine-oak scrub, fields, roadsides
Elevation: 0–500 m

Distribution

V20-1108-distribution-map.gif

Ala., Ark., Fla., Ga., Ky., La., Miss., Tenn., Tex., Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Symphyotrichum pratense"
not tailed +, rounded +  and obtuse +
subclasping +  and sessile +
white-spinulose +, entire +  and serrate +
distinct +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
scabrous +, strigose +  and glabrous +
reduced +
scarious +
5mm +  and 13mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +  and open +
indeterminate +  and determinate +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Rafinesque) G. L. Nesom +
subclasping +  and sessile +
entire +  and serrate +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
scabrous +, strigose +  and glabrous +
cuneate +, cuspidate-mucronate +, acute +  and obtuse +
reduced +
indurate +
5mm;13mm +
Aster pratensis +
subclasping +  and sessile +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
scabrous +, strigose +  and glabrous +
oblong-lanceolate;cuspidate-mucronate;acute;obtuse +
reduced +
4mm;6mm +
rugulose +  and muricate +
oblong-lanceolate +
barbellulate +  and barbellate +
Barrens silky aster +
not 2-lipped +  and actinomorphic +
pink turning purple +  and rose-purple +
at maturity , more or less ampliate , tubes usually shorter +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
tan +  and light-brown +
not compressed +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
Ala. +, Ark. +, Fla. +, Ga. +, Ky. +, La. +, Miss. +, Tenn. +, Tex. +  and Va. +
0–500 m +
subclasping +  and sessile +
entire +  and serrate +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
glabrous +, short-pilose +, glabrate +  and moderately strigose or more or less scabrous +
cuspidate-mucronate;acute;obtuse +
reduced +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Prairies, oak woodlands, pine-oak scrub, fields, roadsides +
disciform +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
linear-lanceolate +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
campanulate +
0.6 cm6 mm <br />0.006 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
2.4 cm24 mm <br />0.024 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
decurrent +
triangular +
subclasping +  and sessile +
entire +  and serrate +
not +  and hyaline +
20mm;30mm +
long-piloso-ciliate +, scabrous +, strigose +  and glabrous +
cuspidate-mucronate +, acute +  and obtuse +
reduced +
5mm +  and 13mm +
2-carpellate +
persistent +
25 +  and 40 +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
strigose +  and glabrous +
Flowering Oct–Nov. +
oblanceolate or spatulate +  and linear +
subequal +  and unequal +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
exalbuminous +
branched +  and simple +
ascending +  and erect +
5 +  and 10 +
appendaged +  and truncate +
papillate +  and smooth +
Aster phyllolepis +, Aster sericeus var. microphyllus +, Symphyotrichum sericeum var. microphyllum +  and Virgulus pratensis +
Symphyotrichum pratense +
Symphyotrichum subg. Virgulus +
species +
ampliate +
stipitate-glandular +
40 cm400 mm <br />0.4 m <br /> (60 cm600 mm <br />0.6 m <br />) +
tree +, shrub +  and subshrub +
lanceolate +  and diamond--shaped +