"Staminate plant 3–7 dm, the pistillate taller, to 12 dm; basal lvs elongate-spatulate to obovate, 8–15 cm; the cauline progressively smaller and narrower, the upper linear; fls white, drying yellowish, the tep 3 mm; staminate spike 4–12 cm × 10–15 mm, with spreading pedicels; pistillate spike very slender, to 3 dm, the pedicels erect or ascending; fr ellipsoid or somewhat obovoid, 7–14 mm; seeds 3–5 mm. Moist woods and bogs; Mass. to Fla., w. to s. Ont., O., s. Ind., s. Ill., Ark., and La. June. (C. obovale)"