Melanopsichium Beck


Melanopsichium austro-americanum (Speg.) Beck on Polygonum acre Kunth


Sori as conspicuous galls in various parts of host plants in the Polygonaceae, composed of hypertrophied host tissue and mycelia, with numerous chambers filled with a great number of solitary spores embedded in a gelatinous mass.

Spore germination of Ustilago-type.

Host-parasite interaction by intracellular hyphae coated by an electron-opaque matrix.

Septa poreless at maturity.


Melanopsichium contains two species, one of which occurs in Australia.

Species in Australia
Melanopsichium pennsylvanicum