Trianea
(named in honour of M. Jose Triana, a botanist and traveller in Columbia). SYNS. Hydromystria, Jalambicea. ORD. Hydrocharideae. A genus comprising three or four species of stove or greenhouse, stoloniferous, aquatic herbs, natives of North America, Mexico, and tropical South America, now regarded, by Bentham and Hooker, as synonymous with Limnobium. Spathes unisexual, two-leaved in both sexes; male flowers two or three in a spathe, long-pedunculate; females solitary in a spathe, sessile or shortly petiolate. Leaves fascicled at the nodes, petiolate, the blades swimming on the top of the water, ovate or rounded-cordate, sometimes (not always) of a thick, spongy substance below. Stems stoloniferous. T. bogotensis, the only species yet introduced, thrives in stove or greenhouse heat. Propagation is readily effected by runners.
T. bogotensis (Bogota). fl. small, six-parted; bracts hyaline, embracing the peduncles. l. clustered, oblong or orbicular, flatconvex, below spongy-reticulated; petioles dilated at base. Columbia, 1879. The correct name of this plant is Limnobium bogotense. (G. C. n. s., xv., pp. 466-468; R. G. 980.)