Restiosporium spathacei Vánky, R.G. Shivas & C. Vánky


Sori in the nuts, ovoid with an acute tip, c. 1 mm long and 0.5 mm wide, replacing the seeds with a black granular-powdery mass of spore balls. The fungus induces transvestism in the host.

Spore balls globose, subglobose to ellipsoidal or slightly irregular, 30–70 × 20–50 µm, dark olivaceous brown, composed of 10–30 (or more?) readily separating spores.

Spores subglobose, ellipsoidal or somewhat irregular, with 1 or 2 slightly flattened sides, 11–16 × 8–13 µm, yellowish to olivaceous brown; wall uniformly 0.5–0.8 µm thick, smooth; free surface very finely verruculose.

Host family: Restionaceae
Host species: Dapsilanthus spathaceus (R.Br.) B.G.Briggs & L.A.S.Johnson


States & Territories: QLD


Restiosporium spathacei differs from R. dapsilanthi by having thinner spore walls (in LM), and spore walls that are smooth on the contact sides, in contrast to the finely and densely verruculose-echinulate spores of R. dapsilanthi (in SEM).