Books by Henry Harold Welch Pearson
Notes on the morphology of cer
Notes on the morphology of certain structures concerned in reproduction in the genus Gnetum
Some observations on Welwitsch
Some observations on Welwitschia mirabilis, Hooker, f.
The flora of Tibet or high Asi
The flora of Tibet or high Asia
On a small collection of dried
On a small collection of dried plants obtained by Sir Martin Conway in the Bolivian Andes