In
botany
Botany, also called , plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek w ...
, sessility (meaning "sitting", used in the sense of "resting on the surface") is a characteristic of plant parts (such as flowers and leaves) that have no stalk.
Plant parts can also be described as subsessile, that is, not completely sessile.
A sessile flower is one that lacks a
pedicel
Pedicle or pedicel may refer to:
Human anatomy
*Pedicle of vertebral arch, the segment between the transverse process and the vertebral body, and is often used as a radiographic marker and entry point in vertebroplasty and kyphoplasty procedures
...
(flower stalk). A flower that is not sessile is
pedicellate. For example, the genus
''Trillium'' is partitioned into two subgenera, the sessile-flowered trilliums (''Trillium'' subg. ''Sessilium'') and the pedicellate-flowered trilliums.
Sessile leaves lack
petioles (leaf stalks). A leaf that is not sessile is
petiolate. For example, the leaves of most
monocotyledon
Monocotyledons (), commonly referred to as monocots, ( Lilianae ''sensu'' Chase & Reveal) are grass and grass-like flowering plants (angiosperms), the seeds of which typically contain only one embryonic leaf, or cotyledon. They constitute one of ...
s lack petioles.
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
Pedicle or pedicel may refer to:
Human anatomy
*Pedicle of vertebral arch, the segment between the transverse process and the vertebral body, and is often used as a radiographic marker and entry point in vertebroplasty and kyphoplasty procedures
...
.
References
Plant morphology
Fungal morphology and anatomy
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