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60 cm long Achenes anthers ascending axillary axils basal leaves base beak blades bracts branches calyx canadensis capsule Carex clusters cm high cm long cm wide cordate corolla corymb culms cyme densely tufted disturbed situations elongate erect Fern florets flowers yellow frequent fruit glabrous glumes grass green greenish heads inflorescence involucre lakeshores lanceolate leaf leaflets leafy leaves alternate leaves lanceolate leaves linear leaves opposite leaves ovate lemmas ligules linear-lanceolate lobes long or longer margins Michx narrowly nodes Nutt oblanceolate oblong obovate occasional open woodland open woods ovary palustris panicle pedicels peduncles Perianth perigynia petals petiole Phyllaries pinnate pinnatifid pistillate pistillate spikes plants pods Potamogeton Potentilla prairie and clearings pubescent purple purplish Pursh raceme racemose Ranunculus rare rhizomes Riding Mountain National Rydb Salix Scrub prairie sepals serrate sessile sheaths shrubs slender spikelets stamens stem leaves terminal spike toothed umbels upper leaves usually waste places whorls