paraphysis

noun

1. A minute jointed filament growing among the archegonia and antheridia of mosses, or with the spore cases, etc., of other flowerless plants.

   “Spores tetrahedral, paraphyses mastoid-claviform, scales smooth, entire.”

2. A type of sterile cell amongst the spore-bearing asci.
3. A derivative of the roof-plate of the telencephalon.