Solidago elongata
Solidago leavenworthii
Cascade Canada goldenrod, narrow goldenrod, west coast Canada goldenrod, west coast goldenrod, west coast or Cascade Canada goldenrod
Leavenworth's goldenrod
1–20+, erect, proximally sparsely to moderately strigoso-villous, distally usually moderately to densely so.
1–10+, erect, scabroso-puberulent proximal to arrays distally, in strips proximal to leaves.
basal 0;
proximal cauline sessile, blades narrowly to broadly oblanceolate, 35–75(–100) × (6–)7.5–14(–20) mm, proximal much smaller, tapering to bases, margins subentire or finely serrulate to coarsely, sharply serrate (teeth 0–9 per side), ciliate, 3-nerved, sometimes obscurely so, apices acute, abaxial faces glabrate to sparsely short-strigose, adaxial glabrous;
mid to distal cauline sessile, blades oblanceolate, becoming lanceolate distally, 20–60 × 4–8(–11) mm, largest near mid stem, somewhat to much reduced distally, margins entire or finely serrulate, rarely serrate (teeth 1–8 per side), usually becoming entire to sparsely serrulate distally, ciliate, apices acute, faces glabrous or sparsely strigoso-villous, more so along abaxial nerves.
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.
2–7 mm, sparsely to moderately short strigoso-villous;
bracteoles 1–3, linear, rarely minutely stipitate-glandular.
1–5 mm, sparsely to moderately strigillose;
bracteoles 1–3, linear-lanceolate.
narrowly campanulate, 2.5–3.5(–4) mm.
narrowly campanulate, 3–5 mm.
(8–)11–15(–17);
laminae 1–2.5 × 0.1–0.4(–0.7) mm.
10–15;
laminae 2–3 × 0.1–0.6 mm.
(3–)5–11(–16);
corollas 2.6–3.7(–4) mm, lobes 0.5–1.2 mm.
6–10;
corollas 3–4 mm, lobes 0.6–1.1 mm.
in 3–4 series, strongly unequal, margins sparsely long ciliate, acute, faces glabrous, rarely sparsely minutely stipitate-glandular;
outer lanceolate, inner linear-lanceolate.
in 3–4 series, strongly unequal (greenish), outer lanceolate, inner oblong-lanceolate, margins ciliate-fimbriate apically, midnerves swollen apically, apices obtuse to rounded, glabrous.
12–500+, sometimes secund, in short to long, thyrsiform or narrowly secund-pyramidal paniculiform arrays, usually congested, club-shaped to rarely wand-shaped, (2.5–) 10–20 × (2–)4–8(–10) cm, branches usually ascending or sometimes arching spreading.
50–350, in secund, usually elongate, pyramidal paniculiform arrays, branches recurved and secund.
(narrowly obconic) 1–1.5 mm, sparsely to moderately strigose;
pappi 2.5–3.3 mm.
(narrowly obconic) 1.1–1.5 mm (ribbed), sparsely strigillose;
pappi 2.5–3 mm.
= 18, 36.
= 18, 36, 54.
Solidago elongata
Solidago leavenworthii
In California, coastal plants of Solidago elongata often have thicker leaves; those of the Sierras are often membranous and obscurely triple-nerved. This species can be similar to S. lepida, which usually has much larger distal cauline leaves.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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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