Glossary of Ecology (6th ed.) by Krebs (2009)
- moderately moist.
"The Kew Plant Glossary (2nd ed., with some additions)" by Beentje (2020)
- With moderate growing conditions, without extremes of moisture or (in common usage) of temperature.
- 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.
- Krebs, C. J. 2009. Ecology, 6th ed. -xvi + 655 pp. Pearson Benjamin Cummings, San Francisco.