Rust Fungi of Southeast Asia

Gerwasia rubi Racib

Description
Uredinia on upper leaf surface, subepidermal, erumpent, round, yellowish brown to reddish brown, hyaline to subhyaline when old, peridium present.

Urediniospores globose, subglobose to obovoid, apex obtuse, hyaline to subhyaline, 25-30 × 23-26 µm; wall 2-3 µm thick, echinulate.

Specimens cited in description:
- BRIP 58369, 58429, 58440

Hosts
Host family:
- Rosaceae

Host species:
- Rubus cochinchinensis
- Rubus ferox

- Rubus multibracteatus

Distribution
Vietnam

Highslide JS
Gerwasia rubi on Rubus cochinchinensis - BRIP 58369.
Highslide JS
Gerwasia rubi on Rubus multibracteatus - BRIP 58440.
Highslide JS
Gerwasia rubi on Rubus ferox - BRIP 58429.
Scale bar = 1 cm.
Highslide JS
Urediniospores of Gerwasia rubi on Rubus cochinchinensis - BRIP 58369.
Scale bar = 10 µm.