Solidago subsect. Argutae
Phytologia 75: 9. 1993.
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).
|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|