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