Harperocallis robustior is a species of flowering plant in the family Tofieldiaceae. It is a rhizomatous plant native to Venezuela. The species was described in 1951, and was moved to its current genus in 2013.
Taxonomy In 1951, Julian Alfred Steyermark described Tofieldia sessiliflora var. robustior, a synonym of Harperocallis robustior. In 1991, Robert William Cruden described the taxon as a species, and placed it in the genus Isidrogalvia. The species was known as Isidrogalvia robustior until 2013, when it was moved to the genus Harperocallis.
Distribution Harperocallis robustior is native to the montane tropical biome of Venezuela. It is present in the states of Lara, Mérida, and Trujillo, at elevations of .
Description Harperocallis robustior is a rhizomatous plant with underground storage organs.
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