acalymmate
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English
[edit]Etymology
[edit]Adjective
[edit]acalymmate (not comparable)
- (palynology) Forming clusters of pollen grains (usually tetrads or polyads) in which the sexines of the respective grains do not merge to form a continuous sheath.
- 1996, John V. Freudenstein, Finn N. Rasmussen, “Sectile Pollinia and Relationships in the Orchideaceae”, in Plant Systematics and Evolution, volume 205, , pages 125–146:
- When loosely associated, each tetrad retains most of its outer exine layer, leading to calymmate tetrads, but an acalymmate massula (since the exine is not continuous around each massula […] ).