Symphyotrichum falcatum
Lindley's aster, little gray aster, little grey aster, western heath or white prairie aster, white prairie aster
1–5+, ascending to erect (grayish brown to brown), moderately to densely hairy.
(light grayish green) firm, margins entire, strigose, apices ± spine-tipped;
basal withering by flowering, sessile, blades oblanceolate, 10–40 × 3–10 mm, bases attenuate, margins usually entire, rarely remotely serrate, scabrous, apices acute to obtuse, rounded to mucronulate-spinose, faces glabrate to moderately strigose;
proximal cauline sessile, blades linear oblanceolate to oblong, 10–40(–60) × 1.5–4(–7) mm, reduced distally, bases cuneate, margins entire, coarsely ciliate, apices acute or obtuse, faces sparsely to densely appressed hispido-strigose;
distal sessile, blades linear-oblong to linear-lanceolate, 25–45 × 2–3 mm, bases cuneate, margins entire, apices acute, faces moderately to densely strigose.
0.2–4 cm, densely hairy, bracts 1–3+, linear to lanceolate, densely hairy.
campanulate, (4.5–)5–8 mm.
(15–)20–35;
corollas usually white, sometimes blue or pink, laminae (8–)18–30 × 1.1–1.4 mm.
(8–)18–30;
corollas yellow becoming brown, 2–2.5 mm, lobes triangular, 0.7–1.2 mm, glabrous.
in 3–4 series, outer oblanceolate to spatulate (1.5–2 mm), inner linear-lanceolate (3–4 mm), unequal, bases (whitish to tan) ± indurate in basal 1/2–3/4, margins hyaline, scabrous proximally, green zones diamond-shaped, in distal 1/4–1/2, apices (outer) acute to obtuse, clear spine-tipped, spreading to reflexed, (inner) acuminate to attenuate, faces sparsely to moderately hispid-strigose.
[(1–)10–200+] in racemiform to diffuse-paniculiform arrays (1–10+ per branch, usually not crowded).
dark brown, obovoid, not compressed, 2–2.5 mm, faint-nerved, faces densely strigose;
pappi whitish, 4.5–6 mm.
Symphyotrichum falcatum
Varieties 2 (2 in the flora).
Symphyotrichum falcatum is introduced in Ontario and Illinois. It may closely resemble S. ericoides, which has smaller heads with fewer florets in denser arrays. The two can be difficult to distinguish on the Great Plains. A. G. Jones (1978) recognized two subspecies of S. falcatum, one with two varieties. Those two subspecies are treated as varieties here.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Plants cespitose, 1–5(–10)-stemmed, usually sparsely appressed-strigose, with cormoid caudices; new shoots developing near the bases of old stems; peduncles long, slender, bracts 1–5; phyllaries subequal (outer longest and foliaceous), apices not strongly squarrose | var. falcatum |
1. Plants colonial, usually densely hairy, rhizomes entangled, usually 1-stemmed, sometimes clumped; new shoots developing at ends of elongated rhizomes; peduncles stout, bracts 2–10+; phyllaries ± unequal, apices strongly squarrose | var. commutatum |
BC
IL Wildflowers
KS Wildflowers
MN Wildflowers
MO Plants
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
