Solidago leavenworthii
Solidago ulmifolia
Leavenworth's goldenrod
elm-leaf goldenrod
1–10+, erect, scabroso-puberulent proximal to arrays distally, in strips proximal to leaves.
usually 1, erect, glabrous, sparsely hairy in arrays.
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.
basal when present similar to proximal cauline;
proximal cauline often withering by flowering, tapering (sometimes rather abruptly) to short, winged petioles, blades ovate-lanceolate, 60–100(–150) × 30–40(–50) mm, thin, margins coarsely serrate, apices acute, abaxial faces hirsute on main nerves, adaxial sparsely hirsute to somewhat scabrous;
mid to distal cauline subsessile to sessile, blades lanceolate, 20–50 × 5–20 mm, gradually reduced distally, margins entire.
1–5 mm, sparsely to moderately strigillose;
bracteoles 1–3, linear-lanceolate.
1.7–2 mm, sparsely to moderately short hispido-strigose, bracteoles 2–7, ovate, grading into phyllaries.
narrowly campanulate, 3–5 mm.
3–4 mm.
10–15;
laminae 2–3 × 0.1–0.6 mm.
3–6;
laminae 1–2 × 0.5–1 mm.
6–10;
corollas 3–4 mm, lobes 0.6–1.1 mm.
4–7;
corollas 2.7–3 mm, lobes 0.5–1.1 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.
(16–18) in 2–3 series, unequal;
outer ovate, acute, inner linear-lanceolate, obtuse to acute.
50–350, in secund, usually elongate, pyramidal paniculiform arrays, branches recurved and secund.
20–150, secund, in open paniculiform arrays, proximal branches elongate and widely divergent, sometimes pyramidal-secund with proximal branches short and recurved-secund.
(narrowly obconic) 1.1–1.5 mm (ribbed), sparsely strigillose;
pappi 2.5–3 mm.
1–1.6 mm, finely hairy;
pappi ± 2.5 mm.
= 18, 36, 54.
Solidago leavenworthii
Solidago ulmifolia
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.)
Varieties 2 (2 in the flora).
Solidago helleri is possibly a hybrid of S. ulmifolia with S. delicatula.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Stems glabrous or nearly so proximal to arrays; throughout range | var. ulmifolia |
1. Stems distinctly spreading-hirsute; Arkansas, Mississippi, Missouri | var. palmeri |
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