1. The problem of species in the northern blue flags, Iris versicolor L. and Iris virginica L;Anderson;Ann. Missouri Bot. Gard.,1928
2. Hybridization in American Tradescantias;Anderson;Ann. Missouri Bot. Gard.,1936
3. Chromosomes and phylogeny in Crepis. II. The relationships of one hundred eight species;Babcock;Univ. California Publ. Agric. Sci.,1934
4. A new form of Aster amethystinus;Bemis;Rhodora,1930
5. Aster amethystinus, an obvious hybrid;Benke;Rhodora,1930