title: Trinucleate pollen in the genus Populus.
abstract: It is shown by light microscopy and microspectrophotometry that several Populus species produce trinucleate pollen. Such pollen seems more widespread than previously acknowledged.
mesh_terms: D002467:Cell Nucleus; D008853:Microscopy; D011058:Pollen; D013053:Spectrophotometry; D014197:Trees