Glossary of "The Evolution of Plants (2nd ed.)" by Willis & McElwain (2014)
- Projections, usually from epidermal cells – often looking like minute hairs on leaves. Important in protecting plants from sunlight and excessive water loss.
- Willis, K. J. & McElwain, J. C. 2014. The Evolution of Plants, 2nd ed. -ix + 398 pp. Oxford University Press, Oxford.