Aquatic and Wetland Vascular Plants of the Northern Great Plains
46. Lentibulariaceae, the Bladderwort Family
1. Utricularia L. -- Bladderwort1. Utricularia intermedia Hayne
Stems very slender, usually creeping along the bottom in shallow water. Leaves numerous, commonly trichotomous at the base and then 1-3X dichotomous, 0.5-2 cm long, the segments slender, flat, not much reduced with each branching, the ultimate segments blunt-tipped; bladders borne on specialized branches distinct from the leaves, 2-4 mm wide; winter buds ovoid or ellipsoid, 5-7 mm long. Flowers usually 2-4 in a lax raceme; peduncle 6-20 cm long; corolla with a lower lip mostly 8-12 mm long, the palate well-developed, nearly 2X as long as the upper lip; spur nearly as long as the lower lip; fruiting pedicels suberect. Jul--Aug. Shallow water of springs, bogs and swamps; rare, in n ND; (Circumboreal, in N. Amer. s to DE, IN, IA, ND and CA).
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