Symphyotrichum lentum
Symphyotrichum laurentianum
Suisun Marsh aster
aster du golfe du saint-laurent, Gulf Of St. Lawrence aster
1–5, ascending to erect, glabrous.
1, decumbent to erect (straight), glabrous.
thin, margins entire, apices acute, faces glabrous;
basal withering by flowering, petiolate, blades linear to narrowly lanceolate, 100–150 × 5–10 mm, attenuate or cuneate, margins entire, apices acute, faces usually glabrous;
proximalmost cauline usually withering by flowering, sessile, blades linear to narrowly lanceolate or oblanceolate, 50–90 × 5–8(–20) mm, bases attenuate or cuneate;
distal sessile, blades 40–80 × 5–8(–15) mm, bases cuneate.
± fleshy, margins entire, eciliate, apices obtuse, faces glabrous;
basal deciduous at bolting, petiolate, blades oblanceolate 44–50 × 5–7 mm [cult.], bases attenuate;
proximal cauline and some distal withering by flowering;
cauline sessile, blades linear-lanceolate to spatulate, 15–55 × 1–4 mm, reduced distally, bases cuneate;
distal sessile, blades linear-lanceolate to spatulate.
glabrous or sparsely villous, bracts 5–15, sessile, lance-linear to lanceolate, margins sometimes spiculate.
glabrous, bracts linear.
campanulate, 5–8 mm.
campanulate, 5–8+mm.
20–45+;
corollas violet, laminae 10–18 × 1–2 mm.
0.
14–47+ in 2–3+ series;
laminae 0 (corolla tubes 2–2.4 mm, shorter than style branches).
35–70+;
corollas yellow, 5–7 mm, lobes triangular, 0.8–1.5 mm.
5–8+;
corollas yellow, 3.1–3.9 mm, lobes deltate to triangular, 0.2–0.3 mm.
in 4–5 series, narrowly oblong (outer) to linear (inner), unequal (outer at least 3 times longer than wide), bases (outer) indurate 1/2 or less, margins scarious proximally, eciliate or ciliolate, green zones lanceolate to elliptic, apices acute to acuminate, faces glabrous.
in 3–4 series, lanceolate, subequal, bases scarious, margins eciliate, green zones foliaceous (outer), apices obtuse, faces glabrous.
in paniculiform arrays, branches some at least 25 cm.
(disciform) in ± densely paniculiform arrays.
brown, cylindric to obovoid, not compressed, 3–4 mm, 2–4-nerved, faces glabrous or hairy;
pappi white, 5–7 mm.
purple, obovoid, ± compressed, 2.8–2.9 mm, 2–4-nerved, faces strigillose;
pappi white to yellowish white, 4.8–5.2 mm.
= 16, 64.
= 14.
Symphyotrichum lentum
Symphyotrichum laurentianum
Symphyotrichum lentum is known only from the Sacramento Valley, North Bay County, lower Sacramento River, and San Francisco Bay areas. Probable intergrades with S. chilense have been noted.
of conservation concern
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Symphyotrichum laurentianum is known only from the southern shores of the Gulf of St. Lawrence.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
