Solidago sempervirens
Solidago sect. Solidago
seaside goldenrod, verge d'or toujours verte
1–10(–20+), erect or ascending, glabrous throughout or hairy in arrays.
rosettes present at flowering;
basal and proximal cauline tapering to long, winged petioles sheathing stems or nearly so, blades narrowly ovate to oblanceolate, 100–400 × 10–60 mm, thick or fleshy, entire, acute, glabrous;
mid to distal cauline usually numerous, sessile, blades lanceolate, 40–60 × 5–10 mm, reduced distally, thick or fleshy, bases sometimes subclasping, margins entire.
basal (rosettes) usually withering by flowering;
petiole bases or vasculature not persisting on rhizomes;
proximalmost cauline petiolate, sometimes present at flowering;
proximal and distal sometimes 3-nerved.
2–3 mm, glabrous or sparsely hairy.
3–7 mm.
8–17;
laminae 5–6.2 × 0.4–0.6 mm.
10–22;
corollas 3–3.2 mm, lobes 0.5–1.2 mm.
in 3–4 series, unequal, lanceolate, margins ciliate, apices acute.
1-nerved, usually not striate (3–5-nerved and striate in S. glomerata, S. lancifolia, S. roanensis) sometimes minutely stipitate-glandular, sometimes resinous.
20–500, secund, in paniculiform arrays, secund-pyramidal to broadly club-shaped, sometimes leafy proximally, at least proximal branches spreading-recurved, branches and peduncles bracteolate, bracteoles reduced distally.
in ± paniculiform or thyrsiform arrays (wand-, club-, or secund cone-shaped) or in axillary clusters, sometimes in rounded corymbiform arrays.
(obconic) 1.1–1.5 mm, moderately strigose;
pappi 3.8–4 mm (slightly clavate).
bristles in 2–3 series (shorter, outer setiform scales rarely present, outer, longer bristles apically attenuate, inner bristles longest, weakly to strongly clavate).
Solidago sempervirens
Solidago sect. Solidago
Subspecies 2 (2 in the flora).
Solidago sempervirens is common along the seacoast from the Gulf of St. Lawrence to central America and the northern West Indies. Introduced populations are sometimes very large near the Detroit River and Lake Erie in southwestern Ontario, eastern Michigan, and adjacent Ohio. A second disjunct group of populations occurs in Illinois and Indiana in the Chicago area at the southern end of Lake Michigan. Two mostly geographically separate subspecies can be recognized in the flora range. A race also occurs in the Azores and is undoubtedly introduced there [Solidago sempervirens var. azorica (Hochstetter ex Seubert) H. St. John]. Plants cultivated in European gardens have been labeled S. sempervirens var. viminea (Aiton) A. Gray.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Species ca. 95 (71 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Involucres 4–7 mm, rays 12–17, disc florets ca. 17–22; Newfoundland to New Jersey, locally to Virginia | subsp. sempervirens |
1. Involucres 3–4 mm, rays 7–11, disc florets ca. 10–16; Massachusetts to Texas and southward | subsp. mexicana |
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