Tilletia marjaniae R.G. Shivas & Y.M. Li

Description

Sori in ovaries of some spikelets, ellipsoidal to ovoid, 1.5–2.0 × 0.5–1.0 mm, partly hidden by the lemma and glumes, initially covered by the peridium which rupture longitudinally at maturity to expose the semi–agglutinated to powdery mass of spores and sterile cells.

Spores globose, subglobose to irregular (15–)20–26(–27) × (13–)18–23(–24) µm, dark reddish brown to opaque, wall 2–4 µm thick including the dense warts 2–3.5 µm high with flattened tips, in surface view the warts appear as dark, irregular regions, 7–13 per spore diam., 20–35 on the spore circumference.

Sterile cells globose, subglobose to ellipsoidal, (15–)21–34(–40) × (13–)18.5–30(–35) µm, yellowish brown, smooth to punctuate, wall laminate (with up to 6 layers), 3–8 µm thick.

Hosts
   
Host family: Poaceae
   
Host species: Eriachne pulchella subsp. dominii (W. Hartley) Lazarides

Distribution

States & Territories: NT, WA

Comments

Tilletia marjaniae has only been found on E. pulchella subsp. dominii, which is endemic to Australia between 16°S and 24°S, where it is often found in stony soils and from sandplains (Simon and Alfonso 2011). T. marjaniae has laminated sterile cells, which differentiates it from T. mactaggartii and T. geeringii.