1. The origin of branching in the aerial shoot of Psilotum nudum;Bierhorst D. W.;Va. J. Sci.,1954
2. On the Stromatopteridaceae (fam. nov.) and the Psilotaceae;Bierhorst D. W.;Phytomorphology,1968
3. LEAF DEVELOPMENT IN SCHIZAEA AND ACTINOSTACHYS
4. Non‐appendicular fronds in the Filicales;Bierhorst D. W.;Bot. J. Linn. Soc.,1973