Solidago leavenworthii
Leavenworth's goldenrod
1–10+, erect, scabroso-puberulent proximal to arrays distally, in strips proximal to leaves.
basal 0;
mid and distal cauline sometimes numerous (75+), somewhat crowded, sessile, blades (dark green) linear-lanceolate to lanceolate, 25–150 × 2–15 mm, margins serrate to entire, scabroso-ciliate, 3-nerved, faces glabrous or with short hairs in lines along nerves.
1–5 mm, sparsely to moderately strigillose;
bracteoles 1–3, linear-lanceolate.
narrowly campanulate, 3–5 mm.
10–15;
laminae 2–3 × 0.1–0.6 mm.
6–10;
corollas 3–4 mm, lobes 0.6–1.1 mm.
in 3–4 series, strongly unequal (greenish), outer lanceolate, inner oblong-lanceolate, margins ciliate-fimbriate apically, midnerves swollen apically, apices obtuse to rounded, glabrous.
50–350, in secund, usually elongate, pyramidal paniculiform arrays, branches recurved and secund.
(narrowly obconic) 1.1–1.5 mm (ribbed), sparsely strigillose;
pappi 2.5–3 mm.
= 18, 36, 54.
Solidago leavenworthii
Solidago leavenworthii replaces S. gigantea on the southern, outer Atlantic coastal plain and into Florida. The leaves of S. leavenworthii usually have fewer, smaller serrations than those of S. gigantea, and they have a distinctive dark, somewhat olive green color. The pyramidal array of S. leavenworthii is usually much narrower and elongate while that of S. gigantea is usually broad and not elongate.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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