Solidago leavenworthii
Solidago ouachitensis
Leavenworth's goldenrod
Ouachita Mountain goldenrod, Ouachita Mountains goldenrod
1–10+, erect, scabroso-puberulent proximal to arrays distally, in strips proximal to leaves.
1–3+, erect, straight, glabrous proximally to 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 withering by flowering;
proximal cauline sessile, blades elliptic, 100–130 × 35–45 mm, margins sharply serrate (with 20–31 teeth), abaxial faces glabrous, adaxial glabrous or sparsely hairy;
distal cauline sessile, blades narrowly elliptic, 65–80 × 13–24 mm, bases cuneate, margins entire to slightly serrate, apices acuminate, faces glabrous.
1–5 mm, sparsely to moderately strigillose;
bracteoles 1–3, linear-lanceolate.
0.5–3 mm, sparsely hispido-strigose;
bracteoles ovate, 1–3 near each head, grading into phyllaries.
narrowly campanulate, 3–5 mm.
narrowly campanulate, (6.5–)7–8 mm.
10–15;
laminae 2–3 × 0.1–0.6 mm.
1;
laminae 2.4–4.7 × ca. 1 mm.
6–10;
corollas 3–4 mm, lobes 0.6–1.1 mm.
4–5;
corollas 1.8–2.8 mm, lobes 0.8–1.6 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.
in ca. 3–4 series, unequal, 1-nerved, obtuse;
outermost linear-oblong, 0.8–1.3 mm.
50–350, in secund, usually elongate, pyramidal paniculiform arrays, branches recurved and secund.
25–50, in non-secund, short, axillary and terminal racemiform/paniculiform arrays 13–25 cm.
(narrowly obconic) 1.1–1.5 mm (ribbed), sparsely strigillose;
pappi 2.5–3 mm.
1.5–2.7 mm, glabrous;
pappi 3–3.5 mm.
= 18, 36, 54.
= 18.
Solidago leavenworthii
Solidago ouachitensis
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.)
Of conservation concern.
Historically Solidago ouachitensis has been included in S. caesia or S. curtisii; it is ecologically and morphologically distinct.
Solidago ouachitensis is known only from the mesic, north-facing slopes of the Ouachita Mountains along the border of Arkansas and Oklahoma. It is a very infrequent species deserving protection and is in the Center for Plant Conservation’s National Collection of Endangered Plants.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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