on Polypogon monspeliensis (L.) Desf. Northland, Kaitaia, 30.XI.1976, E. H. C. McKenzie (PDD 35748) 11, 111 [Holotype]; Whangarei Beach Road, 9.XII.1941, H. H. Allan (PDD 40141-CHR 35170) II, III. Auckland, Western Springs, 15.XII.1979, E. H. C. McKenzie (PDD 40151) 11, 111. Coromandel-Waikato, mouth of Waihou River, 27.XI.1959, R. Mason (PDD40140 -CHR 112686) 11.

Aecia not known. Uredinia µmphigenous, golden brown. Urediniospores (21-) 23-30 (-32) x (11.1-) 19-22 (-23) µm, globose or obovoid, wall (1.5-) 2-2.5 (-3) µm thick, yellow, finely echinulate, germ pores (7-) 8-10, scattered, with conspicuous caps. Telia µmphigenous and on culms, blackish brown. Teliospores (34-) 39-52 (-60) x (14-) 16-20 (-24) µm, constricted at septum, wall 1-1.5 µm thick at sides, (2-) 3-5 (-6) µm at apex, smooth, golden brown apically, paler basally, upper cell ellipsoidal or obovoid, lower cell obovoid; pedicles collapsing and broken to c. 30 x 5-8 µm, hyaline.

Aecia ignota. Uredinia µmphigena, aureo-brunnea. Urediniosporae (21-) 23-30 (-32) x (18-) 19-22 (-23) µm, globosae vel obovoideae, membrana (1.5-) 2-2.5 (-3) µm crassa, flavida, echinulata, poris germinationis (7-) 8-10, sparsis, distincte obturatis. Telia µmphigena culmique, subnigro-brunnea. Teliosporae (34-) 39-52 (-60) x (14-) 16-20 (-24) µm, ad septum constrictae, membrana ad latera 1-1.5 µm crassa, ad apicem (2-) 3-5 (-6) µm, apicaliter aureo-brunneae, basaliter pallidae, cellula apicali ellipsoidea vel obovoidea, cellula basali obovoidea; pedicello usque ad 30 x 5-8 µm, debilitante, pallide flavido. In fohis graminis speciei Polypogon monspeliensis (L.) Desf. Holotypus PDD 35748.

This rust differs from Puccinia polypogonis Speg. as described and figured by Cummins (1971), and confirmed by examination of the isotype (PUR), principally by the narrower urediniospores of P. polypogonobia (av. 19-22 µm versus 22-26 µm), and greater number of germ pores ((7-) 8-10 versus 5-7 (-8)) in the urediniospores. The teliospores of P. polypogonobia are narrower than those of P. polypogonis (av. 16-20 µm versus 20-24 µm), and the septum is in the upper half of the teliospore, whereas in P. polypogonis the septum is nearly median. P. polypogonis has been recorded on Polypogon chilensis (Kunth) Pilger, P. interruptus H. B. K., and P. monspeliensis from South America and South Africa.