His most famous works are perhaps Vegetable Teratology, which dealt with teratology (abnormal mutations) of vegetable species, and several works on Chinese plants (particularly conifers), describing many of the new species discovered by Ernest Henry Wilson.
Njegovi najpoznatiji radovi su Vegetable Teratology (Biljna teratologija), koja se bavila teratologijom (nenormalnim mutacijama) biljnih vrsta te nekoliko radova o kineskim biljkama (posebice golosjemenjača), opisujući brojne nove vrste koje je otkrio Ernest Henry Wilson.