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

Description

Sori in the ovaries of some spikelets, ellipsoidal to fusiform, 3–4.5 × 1–1.5 mm, visible between the palea and lemma; peridium brown, persistent, ruptures longitudinally at maturity to expose the powdery to granular mass of spores and sterile cells.

Spores globose, subglobose to ellipsoidal, (21–)22–29(–38) × 19–27(–36) µm, pale yellowish brown to reddish brown, rarely opaque, wall 2–7.5 µm thick including the dense 2–4 µm high warts with blunt or flattened tips, in surface view warts appear as irregularly polyangular regions 15–20 per spore diam., 30–50 on the spore circumference.

Sterile cells subglobose to irregular, (13–)16–26(–33) × (12–)14–23(–30) µm, subhyaline, smooth or minutely punctuate, wall 2–4 µm.

Hosts
   
Host family: Poaceae
   
Host species: Eriachne burkittii Hartley

Distribution

States & Territories: WA

Comments

Tilletia mactaggartii is one of only three species of Tilletia known from Eriachne. T. mactaggartii is only known from the type specimen on E. burkittii, which is restricted to northern Australia and Papua New Guinea (Simon and Alfonso 2011). T. mactaggartii has more warts per spore diam. than the other two species found on Eriachne.