Utricularia sect. Choristothecae is a section

Section (botany)

In botany, a section is a taxonomic rank below the genus, but above the species. The subgenus, if present, is higher than the section, and the rank of series, if present, is below the section. Sections are typically used to help organise very large genera, which may have hundreds of species...

 in the genus Utricularia. The two species in this section are very small rheophytic

Rheophyte

A rheophyte is an aquatic plant that lives in fast moving water currents in an environment where few other organisms can survive. Rheophytes tend to be found in currents that move at rates of 1 to 2 meters per second and that are up to 3 to 6 feet deep. The amount of force such fast moving currents...

 carnivorous plant

Carnivorous plant

Carnivorous plants are plants that derive some or most of their nutrients from trapping and consuming animals or protozoans, typically insects and other arthropods. Carnivorous plants appear adapted to grow in places where the soil is thin or poor in nutrients, especially nitrogen, such as acidic...

s that were formally included in section Avesicaria

Utricularia sect. Avesicaria

Utricularia sect. Avesicaria is a section in the genus Utricularia. Both species in this section are endemic to Central and South America....

but were reassigned to their own section by Peter Taylor

Peter Taylor (botanist)

Peter Geoffrey Taylor was a British botanist who worked at Royal Botanic Gardens, Kew throughout his career in botany. Taylor was born in 1926 and joined the staff of the herbarium at Kew in 1948. He published his first new species, Utricularia pentadactyla, in 1954...

 in 1989. He had included them in section Avesicaria largely because of the similar habit of the species, but the unique pollen morphology

Plant morphology

Plant morphology or phytomorphology is the study of the physical form and external structure of plants. This is usually considered distinct from plant anatomy, which is the study of the internal structure of plants, especially at the microscopic level...

, dissimilar internal trap glands, and the anthers led Taylor to move these two species to section Choristothecae. Both species are endemic to South America

South America

South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

, with Utricularia determannii

Utricularia determannii

Utricularia determannii is a very small, probably perennial, rheophytic carnivorous plant that belongs to the genus Utricularia. U. determannii is endemic to Suriname, where it is only known from the type location in the Wilhelmina Mountains. It grows as a rheophyte on bare granite rocks in...

only known from Suriname

Suriname

Suriname , officially the Republic of Suriname , is a country in northern South America. It borders French Guiana to the east, Guyana to the west, Brazil to the south, and on the north by the Atlantic Ocean. Suriname was a former colony of the British and of the Dutch, and was previously known as...

 and Utricularia choristotheca

Utricularia choristotheca

Utricularia choristotheca is a very small, probably perennial, rheophytic carnivorous plant that belongs to the genus Utricularia. U. choristotheca is endemic to Suriname, where it is only known from the type location, and French Guiana, where it is found on Montagne des Nouragues. It grows as...

located in French Guiana

French Guiana

French Guiana is an overseas region of France, consisting of a single overseas department located on the northern Atlantic coast of South America. It has borders with two nations, Brazil to the east and south, and Suriname to the west...

and Suriname.