Rust Fungi of Southeast Asia

Puccinia sp.

Description
Uredinia on both leaf surfaces and stems, subepidermal, erumpent, round, up to 400 µm, yellow.

Urediniospores globose to subglobose, apex obtuse, hyaline, 21-26 × 19-24 µm; wall 2.5-4 µm thick, echinulate.

Specimens cited in description:
- BRIP 61458, 62274

Hosts
Host family:
- Alliaceae

Host species:
-
Allium tuberosum

Distribution
Philippines, Thailand

Comments
Two examined specimens of rust on Allium tuberosum from the Philippines and Thailand were more closely related to rusts on hosts in the Hemerocallidaceae than to other species of rust on Allium, such as P. allii and P. porri (McTaggart et al. submitted). The rust on A. tuberosum is not con-specific with P. allii.

Highslide JS
Puccinia sp. on Allium tuberosum - BRIP 61458.
Highslide JS
Puccinia sp. on Allium tuberosum - BRIP 62274.
Scale bar = 2 mm.
Highslide JS
Urediniospores of Puccinia sp. on Allium tuberosum - BRIP 62274.
Scale bar = 10 µm.