In botany, sessility (meaning "sitting", used in the sense of "resting on the surface") is a characteristic of plant parts which have no stalk. Flowers or leaves are borne directly from the stem or peduncle, and thus lack a petiole or pedicel. The leaves of the vast majority of monocotyledons lack petioles.
- Sessility (limnology), organisms anchored to the benthic environment
- Sessility (medicine), tumors and polyps that lack a stalk
- Sessility (zoology), animals that are not able to move about
- Beentje, H.; Williamson, J. (2010). The Kew Plant Glossary: an Illustrated Dictionary of Plant Terms. Royal Botanic Gardens, Kew: Kew Publishing.
- Hickey, M.; King, C. (2001). The Cambridge Illustrated Glossary of Botanical Terms. Cambridge University Press.
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