Sphacelotheca de Bary

Type

Sphacelotheca hydropiperis (Schumach.) de Bary on Polygonum hydropiper L.

Description

Sori in ovaries of Polygonaceae, covered by a peridium. Peridium formed of host tissues and hyaline catenate non-sporogenous fungal cells, bursting at maturity. Columella formed of non-sporogenous fungal cells.

Spores dark, violet-tinted, developed from hyphae at the base of the sorus, initially catenate, connected by disjunctors, later solitary, usually with attached disjunctors, not mixed with hyaline sterile cells (partitioning cells).

Spore germination of Ustilago-type.

Host-parasite interaction by intercellular hyphae lacking interactions, with deposits of specific fungal vesicles.

Septa poreless at maturity.

Comments

Sphacelotheca includes five species, all infecting hosts in the Polygonaceae (Vánky, 2002). One species has been found in Australia.

Species in Australia
 
Sphacelotheca polygoni-serrulati