Spruce ex Oliv.
Utricularia viscosa is a small to medium sized perennial, terrestrial or subaquatic carnivorous plant that belongs to the genus Utricularia and is the only member of Utricularia sect. Sprucea. U. viscosa is native to Central America (Belize and Nicaragua) and South America (Brazil, French Guiana, Guyana, Suriname, Trinidad, and Venezuela). It grows as a terrestrial or subaquatic plant in wet sandy savannas at lower altitudes but as high as 900 m (2,953 ft) in Guyana. It was originally named by Richard Spruce and formally described by Daniel Oliver in 1860. In 1986, Peter Taylor placed this species in its own section, Sprucea, which was named in honor of Richard Spruce.
- Taylor, Peter. (1989). The genus Utricularia - a taxonomic monograph. Kew Bulletin Additional Series XIV: London.
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