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Flat-leaved Bladderwort is a perennial aquatic herb with submerged stems, leaves, bladders, overwintering buds, and emergent flowers. The plants have slender stems with numerous, crowded, finely dissected leaves. The leaves are mostly 0.5-2 cm long, flattened, and have several linear divisions all of about the same width and abruptly tapering or blunt at the tip. Bladders, which trap small aquat...

Columbia Water-meal, a minute floating aquatic perennial, is among the world's smallest flowering plants. The plant body is rootless and thalloid, with no distinction between stem and leaf. The symmetrical, globular, uniformly green thalli are less than 1.5 mm long, smooth and rounded on the back, and floating just below the surface of the water. The plants rarely flower and for the most pa...

A perennial herb up to 45 cm tall. Flowers have five lavender to magenta petals, attached to a white corolla tube with a thin, wavy, reddish to purplish line at the base. Stamens are maroon to dark purple and their filaments are not united at the base. Tip of stigma is not enlarged. Fruit is a capsule with an operculum, a cap-like structure that pops off when seeds are ready for dispersal. Leave...