— pollen size: small pollen grains with thin walls exhibit a lesser degree of infolding.
— pollen coatings: if abundant, pollen coatings act as an insulating layer or sheath against desiccation.
Terms used for common phenotypes of dry pollen include: apertures sunken, boat-shaped, cup-shaped, interapertural area infolded, irregularly infolded, not infolded. In addition, technical terms such as, e.g., barrel-like, disk-like, or kidney-like might be helpful for an adequate description.
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