Solidago subsect. Nemorales

(Mackenzie) G. L. Nesom

Phytologia 75: 8. 1993.

Basionym: Nemorales Mackenzie in J. K. Small, Man. S.E. Fl., 1348. 1933
Synonyms: Incanae Rydberg Radulae Rydberg
Treatment appears in FNA Volume 20. Treatment on page 158. Mentioned on page 109, 110.

Stems and leaves usually moderately to densely strigoso-canescent. Leaves: basal often present in rosettes at flowering, proximalmost cauline petiolate to subpetiolate, sometimes present at flowering, largest sometimes with two prominent lateral nerves (3-nerved). Heads in variously thyrsiform-paniculiform, open to usually congested, cone-shaped, ± secund (to reflexed in S. nemoralis) arrays, proximal branches arching, secund; phyllaries 1-nerved, not stipitate-glandular, not striate. Pappus bristles usually in 2 series (inner usually weakly to moderately clavate).


North America, Mexico.


Species 6 (5 in the flora).

Selected References



1 Heads secund, in rounded, secund, pseudo-corymbiform paniculiform arrays; oftenalkaline meadows and flats, Montana and Idaho s to New Mexico and Arizona Solidago nana
1 Heads usually in narrowly to broadly pyramidal, paniculiform arrays, branches secund > 2
2 Plants with short-branched caudices; arrays secund to apically recurved; prairies and open ground in e deciduous forests Solidago nemoralis
2 Plants creeping-rhizomatous; heads in thyrsiform to secund-pyramidal, paniculiform arrays > 3
3 Leaves finely scabrous, not or weakly 3-nerved; e United States Solidago radula
3 Leaves coarsely scabrous, hispid or soft-canescent, sometimes strongly 3-nerved; prairies and w United States > 4
4 Heads in paniculiform arrays, usually compact, branches broadly thyrsiform to somewhat secund pyramidal, proximal branches reflexed-recurved distally,basal leaves withering by flowering; prairies of Great Plains Solidago mollis
4 Heads in cone-shaped arrays with branches narrowly secund, or open, lax, pyramidal; basal leaves often present at flowering; from near sea to mid montane elevations, Wyoming to s Oregon, s to central Mexico Solidago velutina