1. The morphological continuity of Scrophulariaceae and Orobanchaceae;Boeshore;Contrib. Bot. Lab. Univ. Penn.,1920
2. A preliminary morphological study of Epifagus virginiana (L.);Brooks;Bart. Proc. Indiana Acad. Sci.,1961
3. The vascular tissues and development of sclerenchyma in the stem of the mistletoe, Phoradendron flavescens;Calvin;Bot. Gaz.,1967
4. Observations on the structure and development of Epiphegus virginiana;Cooke;Contrib. Bot. Lab. Univ. Penn.,1904
5. Sieve element cell walls;Cronshaw,1975