perichaetium

noun

peri·​chae·​ti·​um

plural perichaetia

-tēə

: an enveloping sheath in a bryophyte

especially : a cluster of modified leaves surrounding the sex organs or later the seta of mosses

Word History

Etymology

New Latin, from peri- + Greek chaitē flowing hair, mane, foliage + New Latin -ium

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