Solidago subsect. Argutae

(Mackenzie) G. L. Nesom

Phytologia 75: 9. 1993.

Basionym: Argutae Mackenzie in J. K. Small, Man. S.E. Fl., 1345, 1347. 1933
Synonyms: Solidago sect. Secundiflorae Vernae Mackenzie
Treatment appears in FNA Volume 20. Treatment on page 130. Mentioned on page 109, 134, 135.

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).


e North America.


Species 9 (9 in the flora).

Selected References



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