A bract (PO:0009055) that subtends an antheridium (PO:0025125).
Source:ISBN:9780473067304
Comment
When an antheridium occurs on a specialized lateral branch of the gametophore, all of the phyllomes on that branch are usually perigonial bracts. If an antheridium occurs on a main axis of the gametophore, usually only the terminal phyllomes are perigonial bracts.
Subset
Bryophytes
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