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Phragmidium rubi-idaei (DC.) P. Karst.

Description
Uredinia on lower leaf surface, subepidermal, erumpent, round, up to 0.2 mm diam., scattered, yellow; paraphyses peripheral, cylindrical, clavate or incurved, hyaline to subhyaline, 45‒75 × 15‒26 µm; wall 1.0‒2.5 µm thick, sometimes slightly thickened at apex.

Urediniospores subglobose, broadly ellipsoidal or obovoid, yellow, 17‒24 × 14‒18 µm;, wall 1.5‒2.5 µm thick, echinulate.

Telia on lower leaf surface, subepidermal, formed in uredinia, black.

Teliospores cylindrical, apex papillate, 4‒9 celled, commonly 5 celled, reddish brown, 61‒107 × 27‒31 µm; wall 4‒5 µm thick, 6‒11 µm thick at papilla, verrucose, pedicel persistent, expanded at base, not septate, over 100 µm.

Hosts
Host family: Rosaceae
Host species: Rubus idaeus

Distribution
QLD, SA

Comments
Phragmidium rubi-idaei was first reported from Australia by Shivas (1989).

Highslide JS
Phragmidium rubi-idaei on Rubus idaeus - BRIP 55060.
Scale bar = 1 cm.
Highslide JS
Uredinia and telia of Phragmidium rubi-idaei on Rubus idaeus - BRIP 59372.
Scale bar = 5 mm.
Highslide JS
Paraphyses of Phragmidium rubi-idaei on Rubus idaeus - BRIP 55060.
Scale bar = 10 µm.
Highslide JS
Urediniospores of Phragmidium rubi-idaei on Rubus idaeus - BRIP 59372.
Scale bar = 10 µm.
Highslide JS
Teliospores of Phragmidium rubi-idaei on Rubus idaeus - BRIP 59372.
Scale bar = 10 µm.