Solidago subsect. Humiles

(Rydberg) Semple

Sida 20: 1606. 2003.

Basionym: Humiles Rydberg Fl. Rocky Mts., 868. 1917
Treatment appears in FNA Volume 20. Treatment on page 112. Mentioned on page 109.

Leaves: basal sometimes present (in rosettes) at flowering, proximalmost cauline petiolate, often present at flowering, largest, not 3-nerved. Heads in wand-shaped racemiform, paniculiform, or thyrsiform arrays, not secund. Phyllaries not striate, resinous (minute glands present). Pappus bristles usually in 2, rarely in 3 series, (shorter, outer setiform scales rarely present, inner bristles weakly to strongly clavate).


North America, Mexico.


Species 5 (5 in the flora).

Selected References



1 Leaves (and arrays) copiously viscid > 2
1 Leaves (and peduncles and phyllaries) slightly resinous > 3
2 Stems 10–40(–50) cm; basal leaves spatulate, 40–120 mm; dunes and headlands, California, Oregon Solidago spathulata
2 Stems 65–110 cm; basal leaves oblanceolate, mostly 100–200 mm; sand hills, Georgia, South Carolina Solidago kralii
3 Involucres 8–12 mm (along streams, Alabama, Tennessee) Solidago arenicola
3 Involucres 3–7 mm > 4
4 Rays 7–16; plants usually 10–50 cm (to 120 cm in var. gillmanii, dunes, s Lake Michigan, Lake Huron); basal leaves lanceolate, broadly to narrowly oblanceolate, obovate Solidago simplex
4 Rays 3–6; plants 40–120 cm; basal leaves linear-oblanceolate (Yadkin River, NorthCarolina) Solidago plumosa