I02 Uromyces Caryophyllaceae. 



CARYOPHYLLACEAE. 



Dianthus. 



i 1 . Uromyces caryophyllinus (Schrank) Schroet. 

 Schroeter, Brand, p. 10 (1869). 

 McAlpine, Agr. Gaz. N.S.W. VII., p. 300 (1896). 

 Sacc. Syll. VII., p. 545 (1888). 



II. Uredosori amphigenous, dark brown when exposed, but long 



covered by epidermis, round or oblong, scattered, often confluent, 

 up to 3 mm. long. 



Uredospores roundish to oblong, yellowish brown to golden 

 brown, decidedly echinulate, generally 3-4 scattered or nearly 

 equatorial germ-pores on one face, 21-34 X 17-28 ju, average 

 32 x 24 ,1. 



III. Teleutosori amphigenous, blackish-brown, oblong, confluent in elon- 

 gated lines, long covered by ashy epidermis, then margined by the 

 ruptured and ragged cuticle. 



Teleutospores at first intermixed with uredospores, roundish, 

 oval or ovate, cinnamon brown, generally thickened, with broad 

 colourless papilla, average 28 x 20 /t or 22-32 x 17-23 p ; 

 pedicels very deciduous, hyaline, up to 45 ^ long. 



On stems and both surfaces of leaves of Dianthus caryophyllus L. and 

 D. chinensis L. Carnation and Dianthus. 



Victoria Near Melbourne, and at Ardmona. Very common in 



some seasons all the year round. 



New South Wales Ashfield, near Sydney. (Maiden.) 

 South Australia Feb., 1902. 

 Queensland Roma, 1901 (Tryon 8 ). 



There is not much difference between the naked-eye characters of the 

 uredo and teleuto sori, only the latter are a little darker in colour, but 

 the spores themselves are quite distinct, for the uredospores are covered 

 with decided spines, while the teleutospores are relatively smooth and have 

 a clear papilla at apex. 



The teleutospore is filled with finely granular protoplasm, in the centre 

 of which is a large vacuole-like body. When the spore is examined in the 

 dry condition, the surface appears to be covered with numerous very fine 

 points, which Fischer 5 regards as warts. The wall of the uredospore is beset 

 with loosely arranged spines, which project at the margin when seen in 

 optical section, while that of the teleutospore has densely crowded fine 

 points, which are not visible at the margin. These projecting points are so 

 fine that the spore is generally described as smooth. 



Darluca filum Cast, is often parasitic on the uredosori and teleutosori. 



(Plate XVIIL, Figs. 152-154; Plate G., Figs. 30, 31.) 



Scleranthus. 



Uromyces scleranthi Rostr. 



Rostrup, Bot. Tidsskr., p. 40 (1897). 

 Sacc. Syll. XIV., p. 275 (1899). 



II. Uredosori scattered, minute, orbicular or oblong, slightly raised, 

 pale brown, erumpent, and surrounded by the ruptured 

 epidermis. 



