Plants perennial, 5-15 dm; roots also often arising from proximal nodes; rhizomes present, stolons sometimes produced on plants in water. Stems ascending or erect, branched distally, slightly ribbed, glabrous or loosely appressed-to spreading-hirsute near nodes. Leaves: ocrea brown, cylindric, 10-20 mm, chartaceous, base usually inflated, margins truncate, ciliate with bristles 6-12 mm, surface strigose and with loosely ascending to spreading hairs at least proximally, not glandular-punctate; petiole 0.1-0.5 cm, spreading-hirsute, leaves sometimes sessile; blade without dark triangular or lunate blotch adaxially, lanceolate, (3-)6-15(-18) × (1.5-)2-3.2(-4.8) cm, base tapered to truncate, margins appressed-ciliate, apex acute to acuminate, faces sparsely hirsute to loosely appressed hirsute abaxially and adaxially. Inflorescences mostly terminal, erect, uninterrupted, 20-80 × 4-8 mm; peduncle 10-70 mm, strigose; ocreolae overlapping, margins ciliate with bristles (0.6-)1-3(-5) mm. Pedicels ascending, 1-3 mm. Flowers (1-)2-4(-5) per ocreate fascicle, homostylous; perianth greenish proximally, creamy or tan distally, occasionally tinged pink, glabrous, not glandular-punctate, nonaccrescent; tepals 5, connate ca. 3 their length, obovate, 2-3 mm, veins not prominent, not anchor-shaped, margins entire, apex obtuse to rounded; stamens 5, included; anthers pink or red, elliptic; styles 3, connate proximally. Achenes included or apex exserted, brown to black, 3-gonous, (1.5-)2-2.5 × 1.2-1.7 mm, shiny, smooth. 2n = 20.
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