Solidago riddellii
Solidago hispida
Riddell's goldenrod
hairy goldenrod, verge d'or hispide
1–10+, erect, glabrous.
1(–5), erect, simple, glabrous or moderately to densely hispido-villous, sometimes hairs appressed.
basal and proximal cauline usually withering by flowering (other rosettes may be present), tapering to long, winged petioles, blades often recurved, linear- lanceolate or -oblanceolate, 100–240 × 8–16 mm, folded along midrib (V-shaped in cross section), bases usually with (2–)3–8 prominent lateral nerves, apices acute to obtuse, faces glabrous;
mid to distal cauline sessile, blades recurved, linear-lanceolate, 50–70 × 8–11 mm, reduced distally, folded, bases with prominent lateral nerves.
basal and proximal cauline tapering to winged petioles, blades broadly oblanceolate to obovate or elliptic, 35–200 (including petioles) × 15–60 mm, margins serrate or crenate, apices acute, faces sparsely to densely hispido-villous, rarely glabrous;
mid and distal cauline sessile, blades elliptic, 15–30 × 5–7 mm, rapidly reduced distally, margins entire.
2.8–4 mm, moderately short-hispido-strigose, lanceolate bracteoles 0–1.
1.5–2.5 mm, hispido-villous to canescent.
narrowly campanulate, 4.5–6 mm.
campanulate, 4–6 mm.
7–9;
laminae 4.5–5.5 × 0.4–0.5 mm.
6–14;
laminae 1.5–4.5 × 0.5–1 mm.
6–10;
corollas 4.5–5.2 mm, lobes 0.7–1.8 mm.
6–12;
corollas 3–4.5 mm, lobes 0.6–1.2 mm.
(14–18) in 3–4 series, unequal, obtuse, broad, striations weak, obtuse to rounded, glabrous.
in 3–4 series, appressed, strongly unequal, midribs and tips conspicuously green, margins white, scarious, apices obtuse, glabrous or moderately strigose.
30–450 in corymbiform to somewhat paniculiform with rounded corymbiform branches (robust plants) arrays, branches and peduncles strigillose.
8–250+ in usually wand-paniculiform arrays of short axillary and terminal racemiform, non-secund clusters, sometimes proximal branches elongated, ascending and bearing short axillary and terminal racemiform clusters.
1.5–2.2 mm, glabrous;
pappi 3.5–4 mm (apically clavate).
(narrowly obconic) 1–2.5 mm, glabrous;
pappi 2.5–4 mm (sometimes distinctly clavate).
= 18.
= 18.
Solidago riddellii
Solidago hispida
Ray floret color can fade with time, both in the field and on dried specimens, making it difficult to distinguish Solidago hispida from S. bicolor, in which it has sometimes been included. The latter tends to have slightly broader phyllaries and more obviously clavate pappus bristles. The two co-occur in some populations but do not appear to form hybrid swarms with a range in ray corolla color. Three varieties have been described on the basis of growth and pubescence features and are sometimes recognized. These may represent only extremes in continua of variation. Variety lanata has densely villous stems and leaves; such plants occur scattered through much of the range of the species. Two glabrous-stemmed varieties have been described; plants of var. tonsa are relatively small and were first described from Newfoundland; var. huronensis includes relatively tall glabrous plants found growing in sand dunes along the shore of Lake Huron in Michigan and Ontario. The latter plants have been treated as var. tonsa but the name is misapplied. Other varietal names are based on minor variations.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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