Pieter Willem Korthals (September 1, 1807,

Amsterdam Amsterdam ( , , , lit. ''The Dam on the River Amstel'') is the Capital of the Netherlands, capital and Municipalities of the Netherlands, most populous city of the Netherlands, with The Hague being the seat of government. It has a population ...

– March 1892, Haarlem) was a Dutch botanist. Korthals was the official botanist with the Dutch East India Service from 1831 to 1836. Among his many discoveries was the medicinal plant Kratom (''Mitragyna speciosa''). Korthals wrote the first monograph on the tropical pitcher plants, " Over het geslacht ''Nepenthes''", published in 1839.

Carl Ludwig Blume Charles Ludwig de Blume or Karl Ludwig von Blume (9 June 1796, Braunschweig – 3 February 1862, Leiden) was a Germany, German-Netherlands, Dutch botanist. He was born at Braunschweig in Germany, but studied at Leiden University and spent his ...

named the botanical genus '' Korthalsia'' (family Arecaceae) after Korthals, and Philippe Édouard Léon Van Tieghem introduced the genus name '' Korthalsella'' (family Santalaceae) in his honor.Plant Disease Jan. 2009 PD-62
Hawaiian Mistletoes (Korthalsella Species) Bulbophyllum korthalsii was named after him.

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1807 births 1892 deaths 19th-century Dutch botanists Scientists from Amsterdam {{Netherlands-botanist-stub