 | Oakes Ames was an American botanist specializing in orchids. His estate is now the Borderland... more » |
 | Odoardo Beccari was an Italian naturalist perhaps best known for discovering the titan arum, the... more » |
| Olaf Hagerup was a Danish botanist. He studied botany at the University of Copenhagen from 1911... more » |
_(9462991591).jpg/250px-Ordfører_Olav_Gjærevoll_(1980)_(9462991591).jpg "Olav Gjærevoll") | Olav Gjærevoll was a Norwegian botanist and politician for the Labour Party. Gjærevoll was a... more » |
 | Olive Muriel Pink was an Australian botanical illustrator, anthropologist, gardener, and... more » |
 | Oliver Rackham OBE is an academic who studies the British countryside, especially trees,... more » |
 | Olaus Rudbeckius, junior or Olof Rudbeck is a Swedish explorer, scientist, and the son of Olaus... more » |
 | Olof Peter Swartz was a Swedish botanist and taxonomist. He is best known for his taxonomic work... more » |
 | Orator Fuller Cook was an American botanist, entomologist, and agronomist. Cook, born in Clyde,... more » |
 | Orson Knapp Miller, Jr. was an American mycologist. He published numerous papers in mycology and... more » |
| Osborne Morton is a former phycologist in the Ulster Museum. Morton retired in 2007. Morton was... more » |
| Otto Brunfels was a German theologian and botanist. Carl von Linné listed him among the "Fathers... more » |
| Otto Degener was a botanist and conservationist who specialized in identifying plants of the... more » |
| Otto Eugen Schulz was a German botanist, born in Berlin. He was the brother of botanist Roman... more » |
 | Carl Ernst Otto Kuntze was a German botanist. more » |
 | Otto Stapf FRS was an Austrian born botanist and taxonomist, the son of Joseph Stapf. Stapf... more » |
 | Otto II. Freiherr von Münchhausen was a German botanist. He was Chancellor of University of... more » |
| Ove Vilhelm Paulsen was a Danish botanist. He studied at the University of Copenhagen under... more » |
