Rust Fungi of Southeast Asia

Coleosporium zanthoxyli Dietel & P. Syd.

Description
Uredinia on lower leaf surface, subepidermal, erumpent, round, less than 500 µm, yellow, peridium present.

Urediniospores globose, ellipsoidal, subpolyhedrally irregular or asymmetrical, hyaline to subhyaline, 25-33 × 20-27 µm; wall 2-3 µm thick, usually one side of urediniospore wall thickened, apex 4-5 µm thick, verruculose.

Specimens cited in description:
- BRIP 58417

Hosts
Host family:
- Rutaceae

Host species:
- Zanthoxylum avicenniae

Distribution
Vietnam

Comments
The aecial stage of this rust occurs on Pinus thunbergii. The urediniospore size was recorded as 21-42 × 14-29 µm; by Lee et al. (2004). Telia are described for C. zanthoxyli, but were not observed on Vietnamese material, nor the South Korean samples examined by Lee et al. (2004).

Highslide JS
Coleosporium zanthoxyli on Zanthoxylum avicenniae - BRIP 58417.
Highslide JS
Urediniospores of Coleosporium zanthoxyli on Zanthoxylum avicenniae - BRIP 58417.
Scale bar = 1 cm.
Highslide JS
Urediniospores of Coleosporium zanthoxyli on Zanthoxylum avicenniae - BRIP 58417.
Scale bar = 10 µm.