Vegetative key to the families

INSECTIVEROUS PLANTS with either sticky glands on the leaves (Fig.28), or with bladders 1–2 mm long on submerged or subterranean leaves (Fig. 28). Very delicate herbs
Leaves (subterranean or in water) with bladders 1–2 mm long (Fig. 24) Lentibulariaceae
Swamp plants, submerged or exposed or growing on wet ground. Flowers on erect scapes with or without scale leaves. Corolla blue to purple or white. Leaves basal, linear to linear-spathulate or ovate, often minute, usually absent at flowering time
Upper corolla lip not deeply 2-lobed
Corolla lips both 2-lobed; spur longer than the lower lip; whole corolla 6–8 mm long, dark blue. Flowers on slender pedicels in a simple or slightly branched raceme 15–30 cm high. Tending to blacken on drying. Coast and adjacent plateaus. Wet ground. Fl. summer Utricularia biloba