Solidago macrophylla

Banks ex Pursh

Fl. Amer. Sept. 2: 542. 1813.

Common names: Large-leaved goldenrod verge d’or à grandes feuilles
Synonyms: Aster thyrsoideus (E. Meyer) Kuntze Solidago macrophylla var. thyrsoidea (E. Meyer) Fernald Solidago mensalis E. Meyer Solidago thyrsoidea
Treatment appears in FNA Volume 20. Treatment on page 129. Mentioned on page 125.

Plants 20–105 cm; rhizomes short, thick, woody. Stems usually 1, erect, strigose in arrays. Leaves: basal and proximal cauline narrowing abruptly to elongated petioles, blades spatulate to lanceolate or ovate, 60–120(–150) × 14–45(–65) mm, gradually reduced distally, margins serrate (teeth 4–17), abaxial faces glabrous, glabrous or hairy along nerves, adaxial glabrous or sparsely strigose; mid to distal cauline petiolate to sessile, abruptly to gradually tapering to short broadly winged petiole-like bases, blades lanceolate, 22–46(–57) × 8–20(–29) mm, bases rounded, margins entire to slightly serrate, apices acute to acuminate, faces glabrous or sparsely hairy. Heads 2–110+ (1–10 per branch) in leafy, racemiform or short, axillary and terminal racemiform-paniculiform clusters, lateral branches erect, 4–43 cm. Peduncles 5–25 mm, densely short hispido-strigose; bracteoles 0–3, linear. Involucres campanulate, (8.6–)9.5–11.5(–12.5) mm. Phyllaries in 2–3 series, sometimes weakly unequal, glabrate, margins ciliate; outermost ovate, 3–5(–7) mm, acuminate, innermost lanceolate, 1-nerved, tapering to rounded tip. Ray florets 7–13; laminae (4–)4.5–6.5 × 1–2 mm. Disc florets 14–29; corollas (4.4–)5–6 mm; lobes 1–2 mm. Cypselae (± linear-obconic) 1.4–4.4 mm, glabrous; pappi (3.7–)5–6.5(–7.3) mm. 2n = 18.

Phenology: Flowering Aug–Sep.
Habitat: Sandy and gravelly soils, rocky ledges, and outcrops, open areas in woods and thickets
Elevation: 0–1000+ m



St. Pierre and Miquelon, N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Maine, N.H., N.Y., Vt.


Solidago ×calcicola (Fernald) Fernald (S. virgaurea Linnaeus var. calcicola Fernald) is considered to be a hybrid between S. macrophylla and possibly a member of subsect. Triplinerviae.

Selected References


Lower Taxa

... more about "Solidago macrophylla"
John C. Semple +  and Rachel E. Cook +
Banks ex Pursh +
Solidago sect. Glomeruliflorae +
Large-leaved goldenrod +  and verge d’or à grandes feuilles +
St. Pierre and Miquelon +, N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, P.E.I. +, Que. +, Maine +, N.H. +, N.Y. +  and Vt. +
0–1000+ m +
Sandy and gravelly soils, rocky ledges, and outcrops, open areas in woods and thickets +
Flowering Aug–Sep. +
Fl. Amer. Sept. +
Aster thyrsoideus +, Solidago macrophylla var. thyrsoidea +, Solidago mensalis +  and Solidago thyrsoidea +
Solidago macrophylla +
Solidago subsect. Glomeruliflorae +
species +