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Northern Prairie Wildlife Research Center

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Aquatic and Wetland Vascular Plants of the Northern Great Plains

49. Asteraceae, the Aster Family

16. Solidago L. -- Goldenrod

1. Solidago gigantea Ait. -- Late goldenrod

Stems 5-12 dm tall, from stout, creeping rhizomes, often forming patches, mostly glabrous, puberulent on branches of the inflorescence. Leaves lanceolate to elliptic, 6-15 cm long, 1-4 cm wide, prominently 3-nerved, glabrous or sparsely pubescent on the 3 major veins beneath, acuminate, serrate, tapered to a subsessile or short-petiolate base. Inflorescence paniculiform, usually with numerous small heads on ascending to spreading or recurved-secund branches; involucre 2-4.5 mm high, the bracts linear, acute to blunt; ray florets usually 10-17, the ligules mostly 2-3 mm long. Achenes ca. 1.5 mm long, short-hairy. Late Jul--Oct. Wet meadows, ditches, stream banks, moist woods and thickets, also in drier places; common; (N.S. and Que. to B.C., s to GA, NM and OR).

The common phase in this region is var. serotina (O. Ktze.) Cronq., with the leaves entirely glabrous. Occasional plants, with the leaves sparsely pubescent on the midrib and main veins beneath, are var. gigantea.

Solidago canadensis L., Canada goldenrod, is a common upland species that sometimes occurs in wet meadows and other moist places. It is similar to S. gigantea, but smaller in stature and densely short-pubescent on lower leaf surfaces and on the stem below the inflorescence.

GIF- Species Photo/Drawing
GIF- Distribution Map

Map key

Previous Section -- Silphium perfoliatum L. -- Cup plant
Return to Family -- Asteraceae - The Aster Family
Next Section -- Solidago riddellii Frank -- Riddell's goldenrod

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