The shape of the mouth of tube in pore fungi
- angular: not regular in outline, not rounded.
- elongated: becoming longer.
- labyrinthine: having, or composed of, sinuous lines; Like a labyrinth.
- irregular: showing some variation in pore shape and/or pore size.
cf：Sinuous：wavy serpentine (serpentine: bending and twisting like a snake) Labyrinthine: having, or composed of, sinuous lines; like a labyrinth Daedaleoid: having the mouths of the tubes elongate and sinuous as in Daedalea, having a character of Daedalea
Figures 1-4; cf. Ryvarden L and Gilbertson RL. 1989. European Polypores. Part 1. Part 1. Fungiflora, Oslo.