Term DefinitionTags
Operculum  pori thickness similar to a stopper....
Orbiculate  sporoderm with isodiametrical sculptural elements placed irregularly, similar to gemmae....
Ornamentation  elements which constitute the sculpture of a sporoderm....
Oval  distinctive shape of a (depressed or compressed) pollen in equatorial view....
Pentagonal  distinctive shape of a not germinated pollen in polar view....
Perforate  ref. sculture. Very minute tectum perforations which are smaller than the distance between two p...
Pericolpate  ref. pollen. Colpi in open order on the surface of the sporoderm....
Pericolporate  ref. pollen. Colpi which contain pori in open order on the sporoderm surface....
Periporate  ref. pollen. Pori in open order on the sporoderm surface....
Peroblate  ref. pollen. When the P/E ratio is less than 0.50....
Perprolate  ref. pollen. When the P/E ratio is greater than 2....
Perreticulate  reticulate sculpture in semitectate pollens....
Plyca  fold in the sporoderm surface....
Polar  (POLLEN) - pollen grains with a visible polarity....
Polar axis  imaginary line connecting the two poles....
Polar view  view from which it is possible to observe the shape, sculpture, cytoplasm and apertures of a pol...
Polarity  pollen characteristics to possess two endowed poles of equal or different features....
Pollen  The pollen grain is the Gymnosperms and Angiosperms male germ element. Its function relates to t...
Pollinium  it consists of many pollen grain massulae....
Polyad  pollen unity composed of 8-10-12-16-24-32 pollen grains....
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