costa

Term Information

Accession
PO:0030072
Aspect
plant anatomy
Synonyms
related: non-vascular leaf midvein
related: non-vascular leaflet midrib
related: phyllid midvein
exact: costa (Spanish)
exact: costae
exact: non-vascular leaf midrib
exact: phyllid costa
exact: phyllid midrib
exact: 中肋 (Japanese)
broad: mid rib
broad: midrib
Definition
A portion of plant tissue (PO:0009007) that is a single or double strand in the center of a non-vascular leaf and has as part hydrome (PO:0030047) or leptome (PO:0030048). [source: ISBN:376821110]
Comment
Found in bryophytes. Often contains both hydrome and leptome. Functions in support and conduction in a phyllid. The term costa is sometimes used for the midrib of monocot leaves, but this ontology class should only be used for non-vascular leaves.

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External References

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