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Sessility (botany)

From Wikipedia, the free encyclopedia

 The perennial wildflower Trillium cernuum possesses three leaves that are sessile at the top of the stem.
The perennial wildflower Trillium cernuum possesses three leaves that are sessile at the top of the stem.

In botany, sessility (meaning "sitting", used in the sense of "resting on the surface") is a characteristic of plant parts which have no stalk.[1][2] 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.

In addition to these plants, many insects practise sessile nesting practices. For example, Brachygastra scutellaris will build its nest starting with a sessile initiation onto a tree upon which the primary comb is built. Secondary combs are built randomly on this primary comb.[3]

The term sessility is also used in mycology to describe a fungal fruit body that is attached to or seated directly on the surface of the substrate, lacking a supporting stipe or pedicel.[4]

See also

References

  1. ^ Beentje, H.; Williamson, J. (2010). The Kew Plant Glossary: an Illustrated Dictionary of Plant Terms. Royal Botanic Gardens, Kew: Kew Publishing. 
  2. ^ Hickey, M.; King, C. (2001). The Cambridge Illustrated Glossary of Botanical Terms. Cambridge University Press. 
  3. ^ Jeanne, R., 1975. The Adaptiveness of Social Wasp Nest Architecture. The Quarterly Review of Biology 50 (3): 267–287
  4. ^ Ulloa, Miguel; Halin, Richard T. (2012). Illustrated Dictionary of Mycology (2nd ed.). St. Paul, Minnesota: The American Phytopathological Society. p. 575. ISBN 978-0-89054-400-6. 


This page was last edited on 15 October 2017, at 17:55.
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