Glossary of "Evolution of Plants (2nd ed.)" by Willis & McElwain (2014)
- Plants that live in a dry habitat often showing xeromorphic or succulent adaptations.
"The Kew Plant Glossary (2nd ed., with some additions)" by Beentje (2020)
- Adapted to growing and reproducing in areas with low water availability.
- Beentje, H. 2020. The Kew Plant Glossary: An Illustrated Dictionary of Plant Terms, Second Edition, reprinted with some additions. -xii + 184 pp. Royal Botanic Gardens, Kew, Richmond.
- Willis, K. J. & McElwain, J. C. 2014. The Evolution of Plants, 2nd ed. -ix + 398 pp. Oxford University Press, Oxford.