pycnidium (pycnium) A flask-shaped or spherical structure within which conidia are formed in certain types of fungi. Conidia are released via a pore in the wall of the pycnidium. Pycnidia contain minute spores called pycniospores. A Dictionary of Plant Sciences.

What is the difference between a Perithecium and a Pycnidium?

is that pycnidium is in certain fungi, a flask-shaped cavity from the surface of the inner walls of which spores are produced while perithecium is an ascocarp shaped like a skittle or ball, distinguished by a small pore, the ostiole, through which the spores are released one by one when ripe.

What does Pycnidia mean?

: a flask-shaped fruiting body bearing conidiophores and conidia on the interior and occurring in various imperfect fungi and ascomycetes.