Aizoago tetragoniae Vánky & R.G. Shivas

Description

Sori form in bullate swellings up to 1 cm in diam on the stems and fruits, first covered by host tissue that ruptures at maturity, exposing the dark reddish brown, semi-agglutinated mass of spores. Columella and sterile cells absent.

Spores globose, subglobose, ellipsoidal to slightly irregular, 22.5–30 × 24–36 µm (including the sheath), yellowish brown; wall 0.5–0.8 µm thick, even, completely or more often incompletely reticulate, often sparsely verruculose. Muri on the spore circumference thin, acute, 1.5–4 µm high, 17–28 on the spore circumference. The sheaths are evenly or unevenly 3–11 µm thick, pale yellowish brown, composed of a slightly darker inner layer, into which the muri penetrate, and 1–3 paler outer layers.

Spore formation in septate sporogenous hyphae, in rows or rarely in groups. Immature spores globoid, rounded subpolyhedrally irregular, rarely elongate or lacrymiform, at beginning lacking sheath, having only a thin, hyaline spore wall that becomes pigmented and fi nally ornamented with a subhyaline sheath.

Hosts
   
Host family: Aizoaceae
   
Host species: Tetragonia diptera F. Muell

Distribution

States & Territories: WA