Specimen examined: Rekohu, Waitangi, 13.111.1983, E. H. C. McKenzie

Telia amphigenous, reddish-brown, in circinnate groups surrounding the uredinia, long covered. Teliospores 42-50 x (29-) 32-35 (-36) µm, broadly ellipsoidal to cylindrical, sometimes acuminate, usually constricted at septum, wall 3-6 µm thick at sides, (5-) 7-10 µm at apex, smooth, chestnut brown; pedicels up to 60 x 6-11 µm, but usually broken shorter, pale luteus.

On Tetragonia tetragonioides (Pallas) Kuntze

Teliis µmphigenis, rufo-brunneis, circinnatis. Teliosporae 42-50 x (29-) 32-35 (-36) µm, late ellipsoideae vel cylindrcae, interdum acuminatae, ad septum constrictae, membrana ad latera 3-6 µm, ad apicem (5-) 7-10 µm crassae, leves, castaneo-brunneae; pedicello usque ad 60 µm, pallide luteo. In follis aizoaceae speciei Tetragoniae tetragonioidis (Pallas) Kuntze

Although Cunningham (1923, 1931) described teliospores of P. tetragoniae, it is likely that these were described from Australian material since Laundon (1963) did not see any on New Zealand specimens examined during his revision of rusts on Tetragonia. Laundon distinguished three varieties under P. tetragoniae on the basis of urediniospore morphology (size and wall layer thickness) and geographical distribution, viz, var. tetragoniae on T. implexicoma (Miq.) Hook. f. in Australia, var. austro-africana E. M. Doidge on T. tetragonioides in South Africa, and (P. tetragoniae var.) Uredo novae-zelandiae Laundon on T. tetragonioides and T. trigyna Banks & Sol. ex Hook. f. in New Zealand. Although teliospores were unknown for New Zealand collections of the rust, Laundon had little doubt that the rust belonged in this complex.
Urediniospores from the Chatham Islands collection measure (27.5-) 29-32 (-35) x (22-) 24-27 µm, mean 31 x 25 µm, with the inner wall layer 1-2 ,m thick and the outer layer 1-3 µm thick. These measurements are similar to those given by Laundon (1963) for Uredo novae-zelandiae.

Holotypus PDD 56064.

on Carex chathamica Petrie
Specimens examined: Rekohu, Mahahatau Creek, J. F. Findlay, Jan 1955 (PDD 42220 - CHR 97202); east of Te Whanga Lagoon, J. F. Findlay, Jan 1955 (PDD 42221 - CHR 97201); Owenga, 11.111.1983, E. H. C. McKenzie (PDD 44228 - holotype). Rangiauria, B. G. Hamlin, 1 Dec 1957 (PDD 41170 - WELT 3325).
on Carex trifida Cav.
Specimen examined: Rangatira (South East Island), B. Bell, Dec 1961 (PDD 42218 - CHR 158261, PDD 42219 - CHR 158260).

Uredinia amphigenous, mainly on lower (abaxial) surface, cinnamon-brown, pulverulent, up to 1 mm long or confluent and linear, surrounded by the ruptured epidermis. Urediniospores (28-) 33-39 (-46) x (24-) 26-31 (-35) µm, globose or broadly ellipsoidal, wall (1.5-) 2-3.5 (-4) µm thick, golden-brown, echinulate, germ pores 3-4, equatorial.

Urediniis plerumque hypophyllis (abaxialibus), cinnamomeo-brunneis, pulverulentibus, usque ad 1 mm longis. Urediniosporae (28-) 33-39 (-46) x (24-) 26-31 (-35) µm, globosae vel late ellipsoideae, membrana (1.5-) 2-3.5 (-4) µm crassa, aureo-brunnea, echinulata, poris germinationis 3-4, aequatorialibus. In foliis cyperaceae speciei Carex chathamica Petrie et C. trifida Cav.

There are four species of rust fungi recorded on Carex in New Zealand. Urediniospores of Uredo chathamica differ from those of the four Puccinia spp. in size and number of germ pores. Carex chathamica is endemic to the Chatham Islands, while C. trifida, which is indigenous to the South Island and the subantarctic islands of New Zealand, also occurs in Chile and the Falkland Islands.

Holotypus PDD 44228.