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spiraperturate. In DICTIOUS you will not only get to know all the dictionary meanings for the word
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English
Adjective
spiraperturate (not comparable)
- (botany, of a pollen grain) Having an aperture that is spiral in shape.
1991, Armen Leonovich Takhtadzhi͡an, Evolutionary Trends in Flowering Plants, Columbia University Press, →ISBN, page 149:[…] (spiraperturate pollen grains). Spiraperturate pollen grains are found in some liliopsids, such as Lomandra, Aphyllanthes , and Eriocaulaceae. A modified type of the spiraperturate pollen grain is observed in Baxteria […]