Family: Araceae
Spirodela
Citation:
Schleid., Linnaea 13:391 (1839).
Derivation: Greek speira, a coil; delos, conspicuous; on account of the spiral vessels in the structure of the plant.
Synonymy: Not Applicable Common name: None
Description:
Each thallus has a dorsal and a ventral scale; the dorsal scale is small, almost round, membranous, situated at the base of the dorsal side of a very young thallus when still within the parent pocket; the ventral scale is a membrane present on the thallus undersurface at the position from which the roots arise; roots few to several.
Inflorescence produced in one of the 2 lateral pockets, consisting of 1 female and 2 male flowers together in a membranous spathe; male flower composed of 1 stamen with a terminal 2-celled anther; female flower composed of a flask-shaped ovary with 1-several ovules and a solitary terminal style and a concave stigma.
Distribution:
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6 species in all continents except Africa.
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Biology:
No text
Author:
Not yet available
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