perigonium

perigonium [per-i-goh-nee-uh m] ExamplesWord Origin noun, plural per·i·go·ni·a [per-i-goh-nee-uh] /ˌpɛr ɪˈgoʊ ni ə/. Botany.

1. the envelope of modified leaves surrounding the antheridia in mosses.

Also per·i·gone [per-i-gohn] /ˈpɛr ɪˌgoʊn/. Origin of perigonium From New Latin, dating back to 1810–20; see origin at peri-, -gonium Related formsper·i·go·ni·al, per·i·go·nal, adjective Examples from the Web for perigonium Historical Examples of perigonium

At the top of the axis in the male plant rise the antheridia, surrounded by an envelope of modified leaves called the perigonium.

Scientific American Supplement, Vol. XXI., No. 531, March 6, 1886

Various