I2 o Puccinia Gramincac. 



Uredospores globose to shortly elliptical, finely echinulate, 

 golden-brown, with at least ."> uvnn-pores irregularly distributed, 

 21 -24 p diam. or 25-32 x 21-24/i. 



III. Teleutosori minute, elliptical, numerous, black, often confluent 

 lengthwise, soon naked. 



Teleutospores intermixed with uredospores, dark chestnut brown, 

 oblong, constricted at septum, with rounded and thickened apex (up 

 to 9 p), smooth, occasionally tricellular, 33-48 x 18-26 ju, average 

 44 x 24 /u ; upper cell generally hemispherical, and about equal 

 in length to lower ; lower cell generally rounded at base, some- 

 times narrowed and elongated like upper portion of pedicel ; pedicel 

 persistent, tinted, elongated, up to 72 /i long. 



X. Mesospores common, similarly coloured to teleutospores, elongated 

 ellipsoid, rounded or truncate and thickened at apex, smooth, 

 34-43 x 12-15 p. 



On Stipa fiavescens Labill. 



Victoria Near Melbourne, Dec.- April, II., III. 



On Stipa semibarbata R. Br. 



Victoria Nagambie, Nov., 1904, II., III. 



The pulverulent uredosori, and the numerous minute, black teleutosori 

 are characteristic of this species. The uredospores form a rusty powder over 

 entire upper surface of leaf. The pedicel of the teleutospore is sometimes 

 lateral and the septum erect as in Diorchidium. It differs from P. stipae 

 Arthur, in the uredosori being soon naked and decidedly ruddy brown, not 

 yellowish, while the uredospores are broader. 



In specimens of P stipae (Op.) Hora, taken from Syd. Ured. Exs. No. 

 23, on Stipa capillata L., the teleutospores are decidedly different. The 

 apex is generally bluntly pointed, and the size 48-54 x 18-21 p. In speci- 

 mens of P. stipae Arth., from Arthur and Holway's Ured. Exs. No. 27, on 

 Stipa spartea Trin., the teleutospores are more pointed at the apex and 

 rather thicker. 



I have submitted specimens to Prof. J. C. Arthur, and he remarks that 

 it is clearly distinct from his species, although there is very much similarity 

 between the two, as one might expect, from the hosts being essentially alike. 



(Plate II., Fig. 17.) 



43. Puccinia graminis Pers. 



Gramineae. 



Persoon, Disp. Meth., p. 39 (1797). 

 Cooke, Handb. Austr. Fung., p. 335 (1892). 

 Sydow, Mon. Ured. L, p. 692 (1903). 

 Sacc. Syll. VIL, p. 622 (1888). 



II. Uredosori amphigenous, yellowish-brown, linear, 2-3 mm. ~ 

 longer, either scattered or confluent in long streaks, especially on 

 sheaths, pulverulent, soon naked, surrounded by ruptured epi- 

 dermis. 



