Glossary of "Plant Biology (1st ed.)" by Graham et al. (2003)
- Organisms that are composed of many cells, have cellulose-rich cell walls, have chlorophyll in chloroplasts, and are photosynthetic (or, if non-photosynthetic, originated from photosynthetic ancestors), and are adapted in many ways to life on land (or, if aquatic, are descended from land-adapted plants).
Glossary of Plant Systematics (1st ed.) by Simpson (2006)
- A group of organisms, defined either by characteristics (possessing photosynthesis, cell walls, spores, and a more or less sedentary behavior), or by phylogenetic relationships, equivalent in this text to the land plants, Embryophyta.
- Graham, L. E., Graham, J. M. & Wilcox, L. W. 2003. Plant Biology. -xxxv + 497 pp. Pearson Education, Inc., Upper Saddle River.
- Simpson, M. G. 2006. Plant Systematics. -xi + 590 pp. Elsevier Academic Press, Oxford.