0. Pycnia hypophyllous, associated with the aecidia, immersed.
I. Aecidia epiphyllous, on laterals and branches; on leaves in small scattered groups up to 5 mm. diam., on laterals and stems forming elliptical areas up to 10 mm. long, pallid yellow; peridia 0.4-0.5 mm. diam., flask-shaped, opening to the exterior by a small aperture, scarcely evident above the surface of the tissues, margins fimbriate. Spores irregular in shape, elliptical, tending to fusiform, elavate or pyriform, sometimes apiculate, 36-43 x 22-28 mmm. ; epispore hyaline, 1.5 pimm. thick, densely and finely verruculose.

The host is endemic and confined to the mountains of the South Island (Cheesem. 1925, p. 1027). On laterals are sometimes produced distorted inflations, but as a rule the rust is evident only on account of the colour of the aecidia in mass.

Host: Traversia baccharoides Hook. f. Mt. Mantell, Westland, 1,700 m., 2/28. G.H.C. Type.

Both the rust and host plant are endemic. The rust is recorded only from the type locality.