James W. Walker

• Chromosome numbers, phylogeny, phytogeography of the Annonaceae and their bearing on the (original) basic chromosome number of Angiosperms
• Contributions to the Pollen Morphology and Phylogeny of the Annonaceae
• Low altitude large scale reconnaissance
• Pollen morphology, phytogeography, and phylogeny of the Annonaceae .
• The Economic Botany of the Family Annonaceae
• Validation of Reedrollinsia walker (Annonaceae)