Ventricose

Ventricose is an adjective describing the condition of a mushroom, gastropod or plant that it is "swollen, distended, or inflated especially on one side".

[1] In mycology, ventricose is a condition in which the cystidia, lamella or stipe of a mushroom is swollen in the middle.

In gastropods, if the shell of a snail is ventricose or subventricose, it means the whorl of the shell is swollen.

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Types and shapes of cystidial elements in Hyphodontia s.l.: O is ventricose submucronate