Solidago sempervirens
Solidago rupestris
seaside goldenrod, verge d'or toujours verte
rock goldenrod
1–10(–20+), erect or ascending, glabrous throughout or hairy in arrays.
1–10+, erect, proximally glabrous, increasingly puberulent distally into 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 0;
mid and distal cauline numerous (sometime 100+ per stem), crowded, sessile or subsessile;
blades linear-elliptic, mostly 50–120 × 6–12 mm, tapering at both ends, margins remotely serrulate or subentire, 3-nerved, faces glabrous or sometimes puberulent abaxially on midnerves.
2–3 mm, glabrous or sparsely hairy.
1–3 mm, sparsely strigose;
bracteoles linear, 1–3.
3–7 mm.
narrowly campanulate, 2–3 mm.
8–17;
laminae 5–6.2 × 0.4–0.6 mm.
mostly 7–11, 1–2 × 0.1–0.2 mm.
10–22;
corollas 3–3.2 mm, lobes 0.5–1.2 mm.
2–7;
corollas 2–3 mm, lobes 0.4–0.6 mm.
in 3–4 series, unequal, lanceolate, margins ciliate, apices acute.
in 3–4 series, linear-lanceolate, strongly unequal, midribs raised, enlarged apically, apices acute to usually obtuse or rounded, apically ciliate.
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.
80–900+, in paniculiform arrays, branches recurved, secund.
(obconic) 1.1–1.5 mm, moderately strigose;
pappi 3.8–4 mm (slightly clavate).
(narrowly obconic) 1–1.5 mm, sparsely strigillose;
pappi 2–2.5 mm.
= 18, 36.
Solidago sempervirens
Solidago rupestris
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.)
Solidago rupestris is similar to S. canadensis in head size but with fewer rays, and it is vegetatively more like S. gigantea. It is uncommon, occurring in a series of disjunct populations with an apparent gap between eastern and western areas of the range.
(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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