D.Royen; D. van Royen
* December 30, 1727 – April 19, 1799 †
botanist, physician, university teacher
Dutch botanist and physician (1727-1799)
https://www.wikidata.org/wiki/Q938934
https://en.wikipedia.org/wiki/David_van_Royen [View]
Netherlands
* November 11, 1704 – February 28, 1779 †
Collected Poaceae