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

163a.9. Solidago Linnaeus (sect. Solidago ) subsect. Venosae (G. Don) G. L. Nesom, Phytologia. 75: 9. 1993.

Solidago ser. Venosae G. Don in J. C. Loudon, Hort. Brit., 348. 1830; Solidago [unranked] Notabiles Mackenzie; Solidago [unranked] Ulmifoliae Mackenzie; Solidago [unranked] Venosae (G. Don) de Candolle

Leaves: basal withering by flowering, proximalmost cauline petiolate or sessile, usually withering by flowering, proximal usually largest, not 3-nerved (except S. drummondii), usually with pronounced lateral nerves along entire midnerve. Heads in thyrsiform-paniculiform, open to congested, cone-shaped secund arrays, proximal branches arching, secund, often proximalmost elongate and array repeated distally. Phyllaries not striate, eglandular. Pappi bristles usually in 2, rarely in 3 series (shorter, outer setiform scales rarely present, inner weakly, if at all, clavate, moderately so in S. odora).

Species 7 (7 in the flora): North America.

1 Stems developing from branched caudices or short rhizomes, elongate rhizomes 0   (2)
+ Stems developing from elongate creeping rhizomes   (4)
2 (1) Leaves entire, minutely translucent gland-dotted, usually anise-scented when crushed   54 Solidago odora
+ Leaves coarsely to finely serrate, not gland-dotted, not anise-scented   (3)
3 (2) Leaves sparsely hirsute at least on abaxial midribs and main nerves   49 Solidago ulmifolia
+ Leaves glabrous   50 Solidago delicatula
4 (1) Mid cauline leaves sessile, ± clasping, obscurely serrulate or subentire, not rugose   53 Solidago fistulosa
+ Leaves subsessile, not clasping, ± strongly serrate, rugose   (5)
5 (4) Involucres mostly 4–6 mm; broader phyllaries 0.7–1.2 mm wide; stems glabrousbelow arrays; mid cauline leaves elliptic   51 Solidago latissimifolia
+ Involucres mostly 2.5–4 mm; phyllaries usually less than 0.5 mm wide; stems hairy below arrays (except var. sphagnophila which is glabrous but otherwise like var. rugosa); mid cauline leaves lanceolate to ovate   52 Solidago rugosa


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