1 66 British UredinccE and UstilaziiiecF. 



Exsiccati. 

 Cooke, i. i6. Vize, " Micro. Fungi Brit.," 59, 322. 



yEcidiospores on Alliuni w'smu?Ji, June and July. 

 Teleutospores on Phalaris anmdinacea, from August, throughout 

 the winter. 



Biology. — The Hfe-history of this fungus was worked out by 

 Winter. I have been able to repeat Winter's culture of P. sessilis 

 by placing the germinating teleutospores which Mr. Soppitt sent me 

 in 1 888 on Alliuni nrsinimi and Arum maculaluin. On the first- 

 named plant they produced the cecidium, but they had no effect upon 

 the Arum. 



Puccinia phalaridis. Plow. 



Aicidiospores — Pseudoperidia mostly hypophyllous, in circular 

 clusters on yellowish spots, not very prominent, with whitish 

 torn edges. Spermogonia appearing first on the upper surface 

 of the leaf, centrally then surrounded by the cups. Spores 

 roundish, echinulate, orange-yellow, 20-25/* ^^ diameter. 



Uredospores — Sori orange, small, elongated, oval, oblong or linear, 

 sometimes confluent, at length naked. Spores subglobose or 

 oval, yellow, echinulate, 20-25/x in diamei"er. 



Teleutospores — Sori minute, punctate or linear, black, covered by 

 the epidermis, persistent. Spores smooth, brown, sessile, 

 quadrate or attenuated below, truncate or rounded above, 

 apex thickened, sometimes obliquely hooded, slightly con- 

 stricted, 40-50 X 15-18/X. Pedicels very short. 



Synojiyms. 



yEcidiuJu ari. Desm., " Catal. des Plant, oniiss " (1S23), p. 26. 

 Cooke, "Hdbk.," p. 545; "Micro. Fungi," 4th edit., p. 199. 

 Berk., " Eng. Flor.," vol. v. p. 369. 



Puccinia phalaridis, V\o^., Jour. Linn. Soc.^ vol. xxxiv. p. 88. 



Exsiccati 



Cooke, i. 534 ; ii. 84. Vize, " Micro. Fungi Brit," 165, 559. 

 ^cidiospores on Aruui maculaluin^ L., May and June. 

 Uredospores, teleutospores, on Phalaris arundinacea, L., June 

 and July, and from July to May. 



