Uromyces Gramineae. 85 



In carnation rust (U. caryophyllinus) only uredo and teleutospores are 

 known, and this grouping of spore-forms is the most common with us. 

 Aecidia and teleutospores occur on the same host-plant in U. limosellae and 

 U, puccinioides, the uredospores being unknown, and teleutospores alone are 

 found in U. bulbinis and U. di-ploglottidis. The rusts on clover, beet, and 

 carnation are the best known, and since the carnation is attacked at all 

 stages of its, growth, it has suffered considerably from this disease. 



General Characters. Spermogonia mostly globose, immersed, with 

 conical projecting neck. 



Aecidia immersed, finally cup-shaped, with well-developed pseuclo- 

 peiidium; aecidiospores without distinct germ-pores. 



Uredospores solitary on their stalks, with several usually distinct germ- 

 pores. 



Teleutospores unicellular, pedicellate, only one produced from each 

 sporophore, with a single germ-pore at apex. 



Sporidiola hyaline, ovoid, ellipsoid, or almost kidney-shaped. 



Australian species, 27. 



GRAMINEAE. 



Danthonia. 



1. Uromyces danthoniae Me Alp. 



I. Aecidia amphigenous, densely crowded in relatively large clusters, 



bright orange ; pseudoperidia cup-shaped, ivory white, margin 

 regular, upright, very finely toothed, up to 320 p in diam. ; 

 pseudoperidial cells persistent, elongated and polygonal, with 

 striated margin. 



Aecidiospores subglobose to polygonal, orange, average 1 6 jj. diam. 

 or 16 x 12 //. 



II. Uredosori minute, erumpent, somewhat scattered, ruddy brown. 



Uredospores pale yellow to orange yellow, broadly elliptical to 

 ovate, finely echinulate, with as many as six scattered germ-pores 

 on one face, 27-32 x 23-26 /i. 



III. Teleutosori chocolate brown to black, elongated, running in lines, 

 long covered by epidermis. 



Teleutospores at first intermixed with uredospores, pear-shaped to 

 ovate or broadly fusiform, smooth, with thickened apex, 30-41 x 

 20-26 p, average 33 x 22 p ; pedicels elongated, persistent, 

 slightly tinted adjoining spore, up to 96 ju long. 



I. on leaves of Danthonia sp. II. , III. on leaves of Danthonia 

 semiannularis R. Br. 



Victoria Bacchus Marsh, I. Near Melbourne, Ardmona, Portland, 

 Killara, Leongatha, Rutherglen, N"agambie, Kergunyah, fcc., 

 II, III. 



Tasmania Domain, Hobart, Nov., 1894, II., III. (Rod way). 



The aecidium found on a species of Danthonia at Bacchus Marsh is 

 described in connexion with this species as a matter of convenience. 



Puccinia gramindla (Speg.) Diet, and Holw., occurring on a species of 

 Stipa in Argentine, Chili, and California, is the only instance hitherto known 

 where the aecidium-stage is found on a grass. Teleutospores are developed 

 on the same mycelium alongside of the aecidia, and compressing them on 



either side. 



