52.
Solidago rugosa
Miller, Gard. Dict. ed. 8. Solidago no. 25. 1768.
Rough-stemmed or wrinkle-leaf goldenrod , verge d'or rugueuse
Aster rugosus
(Miller) Kuntze
Plants
30—200 cm; rhizomes long-creeping, forming clones.
Stems
1—50+, erect, glabrous or densely hispid to strigose.
Leaves:
basal withering by flowering; proximal cauline usually withering by flowering, sessile, blades elliptic to lanceolate, 68—104 × 20—25 mm, margins sharply serrate, apices acute to attenuate, abaxial faces usually hispido-strigose (at least on main nerves), nerves sometimes prominent, abaxial glabrate; mid to distal cauline sessile, blades lanceolate, elliptic or ovate, (15—)40—75(—90) × (6—)12—22(—32) mm, largest at midstem, somewhat reduced to much reduced distally, margins coarsely to finely serrate, ciliate, indument similar to proximal or denser.
Heads
50—1500 , secund, in secund-pyramidal paniculiform arrays 7—36(—50) × 9—26 cm, compact to lax, branches divergent and recurved, longest 0.8—34 cm, leafy-bracteate.
Peduncles
1—1.8 mm, sparsely to densely hispido-strigillose; bracteoles linear- lanceolate to ovate.
Involucres
narrowly campanulate, (2—)2.5—3.5(—4.5) mm.
Phyllaries
in 3—4 series, strongly unequal, lanceolate to linear-lanceolate, acute to obtuse.
Ray florets
(4—)6—8(—12); laminae (0.9—)1—1.6(—2.3) × 0.4—0.7 mm.
Disc florets
(2—)4—6(—8); corollas 2—3.5(—4.5) mm, lobes (0.5—)0.7—1(—1.3) mm.
Cypselae
(narrowly obconic) 0.9—1.5 mm, moderately strigillose;
pappi
1.8—2.5 mm.
Subspecies 2 (2 in the flora): e North America.
Solidago rugosa
is highly variable in size, array shape, and hairiness. It is similar to members of the
S. canadensis
complex; it differs in not having 3-nerved leaves. The species is divided into two subspecies and five varieties that can be difficult to distinguish.
