1. Bailey, I.W. 1960. Comparative anatomy of the leaf-bearing Cactaceae, I. Foliar vasculature ofPereskia, Pereskiopsis andQuiabentia. J. Arnold Arbor.41: 341–349 (with 7 plates).
2. Bailey, I.W. 1961a. Comparative anatomy of the leaf-bearing Cactaceae, II. Structure and distribution of sclerenchyma in the phloem ofPereskia, Pereskiopsis andQuiabentia. J. Arnold Arbor.42: 144–150 (with 6 plates).
3. Bailey, I.W. 1961b. Comparative anatomy of the leaf-bearing Cactaceae, III. Form and distribution of crystals inPereskia, Pereskiopsis andQuiabentia. J. Arnold Arbor.42: 334–340 (with 6 plates).
4. Bailey, I.W. 1962a. Comparative anatomy of the leaf-bearing Cactaceae, IV. The fusiform initials of the cambium and the form and structure of their derivatives. J. Arnold Arbor.43: 187–197 (with 5 plates).
5. Bailey, I.W. 1962b. Comparative anatomy of the leaf-bearing Cactaceae, VI. The xylem ofPereskia sacharosa andPereskia aculeata. J. Arnold Arbor.43: 376–383 (with 5 plates).