192 



Melampsora Linaceae. 



The paraphyses are noted as absent by Dr. Plowright in his Monograph 

 of the Uredineae, but in these specimens they are particularly abundant, and 

 form a striking feature of the uredosori. Fischer 5 also found the paraphys 

 wanting, and he came to the conclusion with others, that the caeonaa form 

 had been mistaken for the uredo, since the spores were in chains. But 

 Klebahn 3 has proved the existence of both the caeoma form without para- 

 physes and the uredo form with paraphyses, so that the three stages may 

 occur on species of Hypericum. Aecidium disseminatum Berk, is found hex 

 on the same host-plant and in the same locality as this species. 



LIN ACE AE. 



Linum* 



128. Melampsora lini (Pers.) Tul. 



Tulasne, Ann. Sci. Nat,, p. 93 (1854). 

 Cooke, Grev. XL, p. 98 (1883). 

 Cooke, Handb. Austr. Fung., p. 332 (1892). 

 Sacc. Syll. VII., p. 588 (1888). 



II. Uredosori scattered, rounded, orange, soon pulverulent, up to 1^ 



mm. diam. 



Uredospores round or ovate, bright orange-yellow, echinulate, 

 pedicellate, 15-25 x 13-18 p, exceptionally reaching a length of 

 28 fji paraphyses curved, markedly capitate, 17-20 ^t thick. 



III. Teleutsori flattened, often confluent, reddish brown, then black, 

 shining. 



Teleutospores densely crowded beneath epidermis, cylindrical] 

 prismatic, intercellular, polygonal in section, 45-60 x 17-20 //, 

 very occasionally two-celled. 



On leaves and stems of Linum, marginals A. Cunn. Widely distributed. 



Victoria Near Melbourne, Oct., 1885 (Reader). Ardmona, 



Kergunyah, Killara, near Melbourne, Rutherglen, &c., Oct., 



March. 



New South Wales Hume River, 1886 (Jephcott). Guntawan< 



Mudgee (Hamilton); Merilla, Oct., 1890 (Cobb 2 ). 

 South Australia Murray River, 1890 (Tepper), (Ludwig 2 ). 

 Tasmania Near Waterworks, Hobart, Jan., 1892 (Rodway 1 ). 

 On Linum usitatissimum L. wherever flax is cultivated. 



Victoria Near Melbourne, 1902. Donald, Nov., 1903, II., III. 



Port Fairy, Jan., 1904, II., III., &c. 

 South Australia Near Adelaide, 1889 (Crawford). 

 New South Wales Brungle, 1891 (Cobb 4 ). 



In the Journal of Mycology for 1889, Galloway 1 records this rust 

 being sent to him from South Australia by the late Frazer S. Crawford, w] 

 wrote that it had destroyed a crop of flax near Adelaide, and was likely 

 spread and prove a troublesome pest. Bolley informs me by letter thai 

 in Dakota it is a very abundant rust on all the wild varieties of Linum, 

 is always more or less destructive in the flax crop. He further states that 

 it was especially destructive in 1904, in many cases practically destroying 

 crops which he had bred from seeds supposed to be immune to the wilt disease 

 or flax-sick soil disease. 



Dr. Cobb 4 in the Agricultural Gazette of New South Wales for 1891, 

 notes it as causing serious injury to cultivated flax, and in some parts of 

 Victoria, particularly at Port Fairy, I have found it injuring the crop. 

 (Plate XXVI., Fig. 236 ; Plate I., Fig. 36.) 



