Solidago sempervirens
Solidago ohioensis
seaside goldenrod, verge d'or toujours verte
Ohio goldenrod
1–10(–20+), erect or ascending, glabrous throughout or hairy in arrays.
1–10+, erect, slender to stout (tall shoots), glabrous.
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 often persistent, also present as new rosettes at flowering, tapering to winged petioles to 250 mm, blades narrowly ovate to lanceolate, 50–150 × 15–45 mm, apices obtuse to acute, faces glabrous;
proximal cauline similar, reduced distally (petioles becoming less developed);
distal sessile, blades prominently 1-nerved, ovate to lanceolate, 75–100 × 8–12 mm, much reduced distally, margins entire, flat, apices acute.
2–3 mm, glabrous or sparsely hairy.
6.3–8.5 mm, glabrous;
bracteoles 3, linear to lanceolate, sometimes grading into phyllaries.
3–7 mm.
campanulate, 4–5 mm.
8–17;
laminae 5–6.2 × 0.4–0.6 mm.
6–8;
laminae 4.6–5 × 0.5–0.7 mm.
10–22;
corollas 3–3.2 mm, lobes 0.5–1.2 mm.
8–20;
corollas 4–4.5 mm, lobes 0.6–1 mm.
in 3–4 series, unequal, lanceolate, margins ciliate, apices acute.
(14–18) in 3–4 series, broadly linear to ovate, unequal, obtuse, obscurely striate.
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.
10–500+ in corymbiform arrays, branches glabrous.
(obconic) 1.1–1.5 mm, moderately strigose;
pappi 3.8–4 mm (slightly clavate).
(obconic) 1.6–2.2 mm, glabrous;
pappi 2.5–3 mm (apically clavate).
= 18.
Solidago sempervirens
Solidago ohioensis
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 ohioensis is most likely to be confused with S. riddellii, which has folded and multinerved leaves, and S. houghtonii, which has arrays with few large heads. Solidago ohioensis is found in the southwestern Great Lakes area and the flatlands region to the southwest. Hybrids between S. ohioensis and S. ptarmicoides occasionally occur where the two parents are sympatric. Those hybrids were described as S. ×krotkovii B. Boivin [Oligoneuron ×krotkovii (B. Boivin) G. L. Nesom] and can be similar to S. houghtonii.
(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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