Pericladium Pass.

Type

Pericladium grewiae Pass. on Grewia cf. mollis Juss.

Synonyms

Xylosorium Zundel

Description

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.

Species in Australia
 
Pericladium grewiae