Puccinia Gramineae. 117 



Teleutospores oblong to clavate, dark chestnut-brown, con- 

 stricted at septum, rounded or truncate at apex and slightly 

 thickened, 40-56 x 18-24 /i, average 48 x 21 p lower cell 

 generally narrower than and almost as dark as upper; pedicel 

 short, hyaline to pale yellowish, up to 36 p long. 



X. Mesospores comparatively rare, dark chestnut-brown like teleuto- 

 spores, clavate, oval or oblong, rounded or truncate and slightly 

 thickened at apex, base sometimes attenuated, 28-36 x 16-21 jl. 

 On Bromus mollis L. 



Victoria Nalinga, Nov., 1898 (Robinson). Kergunyah, Nov., 

 1902, Dec., 1903, and Jan., 1905 (Robinson). Domain, 

 Melbourne, Dec., 1904, II., III., the latter very plentiful. 

 Nagambie, Nov., 1904. 



New South Wales 1890 (Cobb 2 ). 



On Bromus arenarius Labill. 



Victoria Murray River. 



The specimen of B. arenarius in the National Herbarium attacked by an 

 Ustilago and numbered Berkeley 202, also shows this rust, which, however, 

 was overlooked. It is interesting as probably indicating that this is a 

 native rust, although it also occurs on the imported B. mollis. 



Three-celled teleutospores are occasionally met with, sometimes owing to 

 the upper cell being divided vertically, but more frequently there are 

 two transverse septa instead of one. 



Specimens were examined from Eriksson's Fung. Paras. Scand., Exs. 420, 

 and the uredospores measured 20-25 x 17-20 p, thus being rather smaller 

 than the above. The teleutospores were much paler in colour, and measured 

 36-48 x 15-22/z, the largest being about the average of the Victorian 

 specimens. 



Fritz-Muller 1 observed aecidia on Symphytum qfficinale L. and Pulmonaria 

 montana Lej., and by infection with the aecidiospores produced the rust on 

 Bromus. He therefore named it Puccinia symphyti bromorum. 



(Plate III., Fig. 28 ; Plate C., Figs. 11-13.) 



Rottboellia. 



39. Puccinia cacao Me Alp. 



Uredo rottboelliae Dietel, Engler's Bot. Jahrb. XXXII., p. 52 



(1902). 



Sori on both surfaces of leaves but mostly on under, scattered or in 

 small groups, minute, elliptical, bullate, long covered by epidermis, 

 about J mm. long. 



II. Uredospores brownish or chocolate brown, elliptic to ovoid or oblong, 



with distinct germ-pores, generally three equatorial on one face or 

 may be scattered, epispore thin, dark-coloured, finely echinulate f 

 32-40 x 24-32 p, average 35 x 28 yu. 



III. Teleutospores intermixed with uredospores, sparse, somewhat 

 paler, oblong, smooth, rounded or flattened and unthickened at 

 apex, slightly constricted at septum, 32-35 x 21-22 p ; lower 

 cell tapering slightly towards base and generally about equal in 

 size to upper ; pedicel hyaline, deciduous. 



