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1 Floating stems usually with multiple leaves; capsules 12-25 mm long; flowers yellow
..2 Flowers yellow; adaxial (upper) petal surface densely fimbriate; [FL peninsula]
....3 Upper surface of the petals densely fimbriate; [FL peninsula]
......4 Upper surface of the petals bearing a ruffled crest down its length in the middle
........5 Leaves 5-15 cm wide, roughly pebbled below, thick in texture; stems 1.3-2.5 mm in diameter a few cm below the inflorescence, with conspicuous red spots; tuberous roots of floating clusters stout, blunt-tipped; seeds conspicuously papillate; capsule 10-14 mm long
........5 Leaves 3-7 cm wide, smooth below, thin in texture; stems 0.6-0.9 mm in diameter a few cm below the inflorescence, rarely spotted with red; tuberous roots of floating clusters slender, with pointed tips; seeds smooth (rarely papillate); capsule 4-5 mm long