Urocystis destruens McAlpine


Sori on leaves, leaf sheaths and stems, forming ellipsoidal or fusiform pustules 1–2 mm long or longer by confluence, at first covered by the greyish or lead-coloured epidermis that ruptures irregularly exposing the black granular-powdery mass of spore balls.

Spore balls globose, ellipsoidal to slightly irregular, 20–40 (–50) × 18–30 µm, yellowish to reddish brown, composed of 1 (–3) fertile spores completely surrounded by sterile cells.

Spores globose, subglobose, ellipsoidal to slightly irregular, 12.0–17.5 × 10.0–13.5 µm, yellowish to reddish brown; wall uniformly c. 1 µm thick, smooth.

Sterile cells globose, ellipsoidal, subcuneiform or irregular, with 1 or several flattened sides, 5–16 µm long, yellow; wall even or slightly uneven, 0.5–2.0 (–2.5) µm thick, smooth.

Host family: Liliaceae
Host species: Wurmbea dioica (R.Br.) F.Muell.


States & Territories: VIC