There are thus transitional stages between tetrads and monads (i.e. pollen grains shed singly), between saccate (=vesiculate) and non-saccate, fenestrate and non-fenestrate, heterocolpate and non-heterocolpate grains, etc.
Source: wiktionary
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2 total sentences available.
There are thus transitional stages between tetrads and monads (i.e. pollen grains shed singly), between saccate (=vesiculate) and non-saccate, fenestrate and non-fenestrate, heterocolpate and non-heterocolpate grains, etc.
Source: wiktionary
Heterocolpate pollen grains occur in some genera in which both colporate and simple colpi are found.
Source: wiktionary
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.