Seem fine to me. I didn't realize there was so much on him and should have checked your refs on the article. I'll blame that lapse on missing lunch ... have to blame it on something, I guess. The other bio material is on his own website, but I would think your sources are enough, and better at the moment, at least. And I do agree that the tone you've established is very good, very neutral. Now I wonder if there's any press on a botanist, I know of.(  )