Melchior Treub (December 26, 1851 - October 3, 1910) was a Dutch botanist.
He was born in Voorschoten, and in 1873 he graduated in Biology from the University of Leiden. He remained in Leiden as a botanical assistant. From 1880 until 1909 he was a botanist in the Dutch East Indies.
Treub's worked with tropical flora on Java and organised the botanical gardens at Buitenzorg (Bogor, Indonesia) as a world-renowned scientific institution of botany. He worked for nearly 30 years at the gardens before returning to the Netherlands a year prior to his death in 1910.
In 1903 he established the Buitenzorg Landbouw Hogeschool, a school that later evolved into the Bogor Agricultural Institute. In 1905 he became director of the newly established Department of Agriculture in the Dutch East Indies. In 1907 Treub was the recipient of the Linnean Medal. The Dutch "Society for the Promotion of the Physical Exploration of the Dutch Colonies" is sometimes referred to as the Treub Maatschappij.
As a botanical collector, he traveled throughout the Indies, and to the Philippines, Sri Lanka, Singapore and Penang. He was interested in plant morphology and physiology, and published treatises on the morphology of Balanophoraceae, Loranthaceae and Lycopodiaceae. He is credited for coining the term "protocorm" to describe the early stages in the germination of lycopods.
- "This article incorporates information based on a translation of an equivalent article at the French Wikipedia".
- Nationaal Herbarium Nederland (biographical data)
- JSTOR Global Plants (biography)
-  Botanical Bulletin of Academia Sinica, Vol. 46, 2005 Protocorm or rhizome? The morphology of seed germination in Cymbidium dayanum
- JSTOR The Archegonium and Sporophyte of Treubia Insignis Goebel by Douglas Houghton Campbell Page 261 of 261-273.
- "Author Query for 'Treub'". International Plant Names Index.
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