(Singular = Cheilocystidium, Plural = Cheilocystidia)
1. A cystidium (plural cystidia) is a relatively large cell found on the hymenium of a basidiomycete (for example, on the surface of a mushroom gill), often between clusters of basidia. Since cystidia have highly varied and distinct shapes that are often unique to a particular species or genus, they are a useful in the identification of basidiomycetes. In general, the adaptive significance of cystidia is not well understood. Cheilocystidia are located on the true gill edges. In general, cheilocystidia tend to vary in morphology more than pleurocystidia, but they are typically reasonably constant for a species and in many instances do furnish valuable taxonomic characters. The size varies with the species being small in some (14-20 µ long) and up to 75µ long in others. By definition cheilocystidia are the hyphal end-cells on the gill edge which do not produce basidiospores. They may be in the form of basidioles, resemble the pleurocystidia in shape, or have their own distinctive morphological characters.
Created: 2019-06-22 15:29:20 CDT (-0400)
Last modified: 2019-08-18 14:05:12 CDT (-0400)