Pericladium grewiae Pass. on Grewia cf. mollis Juss.
Sori as pustules or galls on stems, enclosed by a hard coriaceous peridium of host tissue, rupturing irregularly at maturity and exposing the dark semi-agglutinated spore masses.
Spores at first agglutinated, separating at maturity.
Spore germination resulting in either an ovoid basidium from which septate ramified hyphae develop producing secondary sporidia, or the spores germinate directly to form branched septate hyphae.
Host-parasite interaction by intracellular hyphae coated by an electron-opaque matrix.
Septa poreless at maturity.