acalymmateとは 意味・読み方・使い方

形容詞

acalymmate (not comparable)

1. (palynology) Forming clusters of pollen grains (usually tetrads または 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”, 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 […] ).

関連する語

• calymma