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

163a.6. Solidago Linnaeus (sect. Solidago ) subsect. Argutae (Mackenzie) G. L. Nesom, Phytologia. 75: 9. 1993.

Solidago [unranked] Argutae Mackenzie in J. K. Small, Man. S.E. Fl., 1345, 1347. 1933; Solidago sect. Secundiflorae Torrey & A. Gray; Solidago [unranked] Vernae Mackenzie

Leaves: basal sometimes present (rosettes) at flowering, proximalmost cauline petiolate, often present at flowering, largest, not 3-nerved. Heads secund in open, secund, cone-shaped arrays, lowest branches often elongate and repeating pattern, not stipitate-glandular. Phyllaries not striate, eglandular. Pappus bristles usually in 2 series (inner usually moderately clavate).

Species 9 (9 in the flora): e North America.

1 Leaves minutely scabrous, puberulent or short-villous   (2)
+ Leaves glabrous or nearly so   (4)
2 (1) Leaves scabrous on abaxial faces (hairs short with swollen bases); bogs and swamps   35 Solidago patula
+ Leaves soft-villous or puberulent   (3)
3 (2) Rays usually 7–12; leaves moderately to densely short-villous; spring blooming; coastal plain of North Carolina, South Carolina   33 Solidago verna
+ Rays 0–(1–2); leaves densely and finely puberulent; fall blooming; open woods, coastal plain and piedmont; North Carolina to Alabama (possibly Mississippi)   34 Solidago brachyphylla
4 (1) Phyllaries striate, several nerves enlarged; involucres 4.5–6(–7) mm; Kentucky, West Virginia   30 Solidago faucibus
+ Phyllaries not striate, only main nerve enlarged (very rarely more striate in S. arguta); involucres 2.5–5.6 mm   (5)
5 (4) Plants without slender stoloniferous rhizomes   29 Solidago arguta
+ Plants with slender stoloniferous rhizomes in addition to main, deeper rhizomes or caudices   (6)
6 (5) Proximal leaves elliptic to obovate (ovate), acute or obtuse, with narrowly attenuate bases; distal cauline leaves quickly reduced, ascending to appressed   31 Solidago ludoviciana
+ Proximal leaves mostly ovate, acute to acuminate, with truncate to obtuse bases; distal cauline leaves gradually reduced, rarely appressed   32 Solidago tarda


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