Aquatic and Wetland Vascular Plants of the Northern Great Plains
49. Asteraceae, the Aster Family
16. Solidago L. -- Goldenrod2. Solidago riddellii Frank -- Riddell's goldenrod
Stems 2-7(10) dm tall, clumped from a thick caudex, sometimes with rhizomes, glabrous to sparsely pubescent above. Leaves with blades lanceolate to linear-oblong, conduplicate, firm and glabrous, margins entire or with obscure, remote teeth, the basal leaves much larger than the cauline, often deteriorating early, their blades 10-20 cm long, 5-30 mm wide, on long, winged petioles usually exceeding the blade in length; cauline leaves smaller and numerous, becoming sessile and clasping upward, falcate-folded. Inflorescence corymbiform, often with corymbiform lateral branches; heads usually numerous and crowded, not secund on the branches; involucre 5-6 mm high, the bracts obtuse or rounded; rays 7-9, the ligules ca. 2 mm long. Achenes ca. 2 mm long, glabrous or nearly so. Jul--Oct. Fresh wet meadows and fens; rare in se ND and extreme e SD, more common e into MN; (Ont. to se ND and e SD, s to OH and MO).
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