Symphyotrichum turbinellum

(Lindley) G. L. Nesom

Phytologia 77: 293. 1995.

Common names: Prairie aster
Endemic
Basionym: Aster turbinellus Lindley Compan. Bot. Mag. 1: 98. 1835
Treatment appears in FNA Volume 20. Treatment on page 530. Mentioned on page 476, 501, 531.

Perennials, 30–100 cm, cespitose; with thick, branched, woody caudices. Stems 1–5+, erect, straight (stout, brittle), glabrous or sparsely hirtellous in lines. Leaves (paler green or bluish green abaxially) firm, margins scabrous, apices mucronate, faces glabrous, abaxial raised midribs scabrous to glabrate; basal withering by flowering, subpetiolate to shortly petiolate (petioles winged, sheathing, coarsely ciliate), blades oblanceolate to oblong-oblanceolate, 45–65 × 5–8 mm, bases cuneate, margins shallowly crenate, strigoso-ciliate, apices acute, obtuse or rounded; proximal cauline withering by flowering, subpetiolate or sessile, blades elliptic-lanceolate to linear-oblanceolate or lanceolate, 40–120 × 5–20 mm, reduced distally, bases cuneate to slightly attenuate or rounded, slightly clasping, margins serrulate-crenate or entire, apices acute to acuminate; distal sessile, blades oblanceolate or elliptic-lanceolate to linear-lanceolate or linear-oblong, (10–) 15–100 × 1–5 mm, gradually reduced distally (more strongly so on branches), bases cuneate or rounded, margins entire, apices acuminate. Heads in open, broad, much ramified, paniculiform arrays, branches ascending to arching, thin, brittle, remotely leafy, rarely sessile. Peduncles long, thin, (1–) 4–10 (–25) cm, branches to 10 cm, bracts 8–15, regularly spaced but becoming crowded distally, appressed or ascending, linear-oblong to subulate, 1.5–4 mm, grading into phyllaries, mucronulate. Involucres turbinate to cylindro-campanulate, 7–12 mm. Phyllaries in 6–9 series, appressed or ± spreading, shortly oblong-lanceolate to subulate (outer) to linear-oblong or linear (inner), strongly unequal, bases indurate 1/2–5/6, abaxially rounded, margins scarious, erose, hyaline, sparsely ciliolate distally, green zones oblanceolate to rhombic-oblanceolate, in distal 1/6–1/2, apices acute (outer) to obtuse or rounded (inner), often callous-mucronulate, faces glabrous. Ray-florets 14–20; corollas light blue to lavender or purple, laminae 12–20 × (1–) 1.5–2.8 mm. Disc-florets 15–20+; corollas yellow turning purple, (4.5–) 5–7 mm, tubes slightly shorter than narrowly funnelform throats, lobes triangular, 0.5–1 mm. Cypselae yellow-tan or light-brown to gray, obovoid, ± compressed, (1.8–) 2–2.8 mm, 2–4-nerved, faces minutely strigillose; pappi whitish to reddish-brown, 4.5–6.4 mm. 2n = 96.


Phenology: Flowering Aug–Oct.
Habitat: Open, dry, acidic (chert, sandstone, or granite), rocky or loamy soils, woods and glades on upland slopes and ridges in soils associated with or on leached soils above bluffs, pastures, roadsides
Elevation: 60–900 m

Distribution

V20-1179-distribution-map.gif

Ark., Ill., Iowa, Kans., La., Mo., Nebr., Okla.

Discussion

Symphyotrichum turbinellum is mostly Ozarkian.

Selected References

None.

Lower Taxa

None.

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

scabrous +  and glabrate +
not tailed +, rounded +  and obtuse +
sessile +, subpetiolate +  and shortly petiolate +
distinct +
4 cm40 mm <br />0.04 m <br /> (12 cm120 mm <br />0.12 m <br />) +
reduced +
scarious +
5mm +  and 20mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +, ramified +  and open +
indeterminate +  and determinate +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Lindley) G. L. Nesom +
sessile +, subpetiolate +  and shortly petiolate +
4 cm40 mm <br />0.04 m <br /> (12 cm120 mm <br />0.12 m <br />) +
rounded +, cuneate +, acute +  and acuminate +
reduced +
indurate +
5mm;20mm +
Aster turbinellus +
sessile +, subpetiolate +  and shortly petiolate +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (10 cm100 mm <br />0.1 m <br />) +
elliptic-lanceolate;linear-lanceolate or linear-oblong +
reduced +
1mm;5mm +
rugulose +  and muricate +
crowded +  and spaced +
ascending +  and appressed +
mucronulate +, linear-oblong +  and subulate +
sessile +  and leafy +
ascending;arching +
barbellulate +  and barbellate +
sessile +  and petiolate +
Prairie aster +
not 2-lipped +  and actinomorphic +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
yellow turning purple +, light blue +  and lavender or purple +
at maturity , more or less ampliate , tubes usually shorter +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
light-brown +  and gray +
strigillose +  and glabrous +
compressed +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
Ark. +, Ill. +, Iowa +, Kans. +, La. +, Mo. +, Nebr. +  and Okla. +
60–900 m +
strigillose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open, dry, acidic (chert, sandstone, or granite), rocky or loamy soils, woods and glades on upland slopes and ridges in soils associated with or on leached soils above bluffs, pastures, roadsides +
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 />) +
turbinate;cylindro-campanulate +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
12mm;20mm +
2 (?) +  and 5 (?) +
1.5mm;2.8mm +
sessile +  and petiolate +
cauline +  and basal +
decurrent +
reflexed;spreading;erect +
triangular +
sessile +, subpetiolate +  and shortly petiolate +
40mm;120mm +
acute +  and acuminate +
reduced +
5mm +  and 20mm +
2-carpellate +
whitish +  and reddish-brown +
persistent +
25 +  and 40 +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.64 cm6.4 mm <br />0.0064 m <br />) +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Flowering Aug–Oct. +
spreading +  and appressed +
shortly oblong-lanceolate +  and subulate +
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 +
straight +
1 +  and 5 +
appendaged +  and truncate +
papillate +  and smooth +
Aster sect. Heterastrum +  and Aster subg. Symphyotrichum +
Symphyotrichum turbinellum +
Symphyotrichum sect. Symphyotrichum +
species +
funnelform-campanulate +  and cylindric +
ampliate +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
tree +, shrub +  and subshrub +
oblanceolate +  and rhombic-oblanceolate +