Solidago subsect. Venosae

(G. Don) G. L. Nesom

Phytologia 75: 9. 1993.

Basionym: Solidago (sect. Undefined) ser. Venosae G. Don in J. C. Loudon, Hort. Brit., 348. 1830
Synonyms: Notabiles Mackenzie Ulmifoliae Mackenzie Venosae (G. Don) de Candolle
Treatment appears in FNA Volume 20. Treatment on page 143. Mentioned on page 110, 144, 148, 149.

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).

Distribution

North America.

Discussion

Species 7 (7 in the flora).

Selected References

None.

Key

1 Stems developing from branched caudices or short rhizomes, elongate rhizomes 0 > 2
1 Stems developing from elongate creeping rhizomes > 4
2 Leaves coarsely to finely serrate, not gland-dotted, usually anise-scented whencrushed Solidago odora
2 Leaves entire, minutely translucent gland-dotted, not anise-scented > 3
3 Leaves sparsely hirsute at least on abaxial midribs and main nerves Solidago ulmifolia
3 Leaves glabrous Solidago delicatula
4 Mid cauline leaves sessile, ± clasping, obscurely serrulate or subentire, not rugose Solidago fistulosa
4 Leaves subsessile, not clasping, ± strongly serrate, rugose > 5
5 Involucres mostly 4–6 mm; broader phyllaries 0.7–1.2 mm wide; stems glabrousbelow arrays; mid cauline leaves elliptic Solidago latissimifolia
5 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 Solidago rugosa