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FNA | Family List | FNA Vol. 20 | Asteraceae | Solidago

163a.11. Solidago Linnaeus (sect. Solidago ) subsect. Nemorales (Mackenzie) G. L. Nesom, Phytologia. 75: 8. 1993.

Solidago [unranked] Nemorales Mackenzie in J. K. Small, Man. S.E. Fl., 1348. 1933; Solidago [unranked] Incanae Rydberg; Solidago [unranked] Radulae Rydberg

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 flower-ing, 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).

Species 6 (5 in the flora): North America, Mexico.

1 Heads secund, in rounded, secund, pseudo-corymbiform paniculiform arrays; oftenalkaline meadows and flats, Montana and Idaho s to New Mexico and Arizona   69 Solidago nana
+ Heads usually in narrowly to broadly pyramidal, paniculiform arrays, branches secund   (2)
2 (1) Plants with short-branched caudices; arrays secund to apically recurved; prairies and open ground in e deciduous forests   67 Solidago nemoralis
+ Plants creeping-rhizomatous; heads in thyrsiform to secund-pyramidal, paniculiform arrays   (3)
3 (2) Leaves finely scabrous, not or weakly 3-nerved; e United States   71 Solidago radula
+ Leaves coarsely scabrous, hispid or soft-canescent, sometimes strongly 3-nerved; prairies and w United States   (4)
4 (3) 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   70 Solidago mollis
+ 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   68 Solidago velutina

Lower Taxa


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