Glossary of "Plant Systematics (1st ed.)" by Simpson (2006)
- With veins successively branching distally into two veins of equal size and orientation, e.g. Ginkgo biloba. (leaf venation)
Glossary of "A Botanist's Vocabulary" by Pell & Angell (2016)
- 1. branching pattern in which each branch splits into two branches; 2. type of identification key, in which each step has two choices and each choice leads to a different subset of options.
- Simpson, M. G. 2006. Plant Systematics. -xi + 590 pp. Elsevier Academic Press, Oxford.
- Pell, S. K. & Angell, B. 2016. A Botanist's Vocabulary: 1300 Terms Explained and Illustrated. 226 pp. Timber Press, Portland.