Symphyotrichum subulatum
Symphyotrichum
aster
generally erect, glabrous to densely pubescent, sometimes glandular-pubescent.
basal and cauline, alternate, linear to lanceolate or elliptic or obovate, generally entire;
basal leaves senescent or persistent at flowering, petiolate to sessile.
compact to open panicle- or raceme-like arrays;
branches usually bracteolate.
cylindrical to campanulate.
flat to slightly convex;
paleae 0.
(0)10–50(100), pistillate;
rays white to pink or violet-purple.
(6)10–50(100); bisexual;
corollas yellow, tubular;
tubes < throats;
lobes triangular; erect or reflexed.
in 3–6 series, appressed to spreading, imbricate to subequal or outer bracts longer, bases with pale scarious margins and tips green, or the outer foliaceous and green throughout.
obconic; somewhat flattened, 3–5-veined, brown to purplish;
pappi of (20)25–40 barbellate bristles in 1 series.
radiate or rarely discoid.
Symphyotrichum subulatum
Symphyotrichum
Asia, North America, South America. ~90 species; 15 species treated in Flora.
Symphyotrichum is well known for its taxonomic difficulty, a reflection of multiple factors including the prevalence of polyploid complexes (in Oregon, mainly involving species with n=8) and the influence of phenology and environment on many morphological characters. Symphyotrichum novae-angliae, an occasional garden escape, is separable from S. campestre by its larger heads with usually 50–75 rays (versus 15–30 rays for S. campestre).
Geraldine Allen
CA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
OR
WA
