Rust Fungi of Southeast Asia

Phakopsora tecta H.S. Jacks. & Holw.

Synonyms
Physopella tecta (H.S. Jacks. & Holw.) Azbukina

Description
Uredinia abaxial, on yellow circular to irregular spots with diffuse margins that often coalesce and have centres that become necrotic, supepidermal, erumpent, opening by a central pore, mostly in groups, dome shaped, about 200 µm diam., yellowish brown or becoming dark brown, peridium present, paraphyses peripheral, clavate or capitate, hyaline or yellowish-brown, up to 10-40 µm, mostly 8-10 µm.

Urediniospores subglobose to broadly ellipsoidal, subhyaline, 18-27 µm × 17-24 µm; wall 1.0-1.5 µm thick, densely and minutely echinulate, germ pore absent or inconspicuous.

Hosts
Host family:
-Commelinaceae

Host species:
- Commelina sp.

Distribution
Philippines, Vietnam

Highslide JS
Phakopsora tecta on Commelina cyanea - BRIP 53418 (specimen from Australia).
Scale bar = 1 cm.
Highslide JS
Uredinia of Phakopsora tecta on Commelina cyanea - BRIP 15596 (specimen from Australia).
Scale bar = 2 mm.
Highslide JS
Urediniospores of Phakopsora tecta on Commelina cyanea - BRIP 53418 (specimen from Australia).
Scale bar = 10 µm.
Highslide JS
Paraphyses of Phakopsora tecta on Commelina cyanea - BRIP 53418 (specimen from Australia).
Scale bar = 10 µm.