Rust Fungi of Southeast Asia

Puccinia philippinensis Syd. & P. Syd.

Description
Uredinia on lower leaf surface, subepidermal, erumpent, linear, up to 3 mm long, yellowish brown, peridium rupturing host epidermis.

Urediniospores globose to subglobose, apex obtuse, yellowish brown, 17-22 × 15-20 µm; wall 1.5-3 µm thick, finely echinulate, with 2 scattered germ pores.

Telia on lower leaf surface, subepidermal, linear, up to 2 mm long, black, with peridium.

Teliospores clavate, apex acuminate, 2-celled, reddish brown, 41-62 × 14-16 µm; wall 1-2 µm thick at sides, 4-10 µm thick at apex, smooth, with persistent pedicel.

Specimens cited in description:
- BRIP 57418, 57494.

Hosts
Host family:
- Cyperaceae

Host species:
- Cyperus iria

Distribution
Philippines

Comments
Sydow and Sydow (1913) described Puccinia philippinensis on Cyperus polystachyos and C. rotundus from the Philippines. Its host range was further extended by Teodoro (1937). Barreto and Evans (1995) synonymized P. philippinensis with P. canaliculata, which was described from North America and is morphologically similar. We applied P. philippinensis to this taxon in recognition that there is likely diversity among the species of Puccinia on Cyperus.

Highslide JS
Puccinia philippinensis on Cyperus sp. - BRIP 57418.
Highslide JS
Urediniospores of Puccinia philippinensis on Cyperus sp. - BRIP 57418.
Scale bar = 10 µm.
Highslide JS
Puccinia philippinensis on Cyperus iria - BRIP 57494.
Scale bar = 10 µm.