198 British Uredinece and Ustilagiiiece. 



yellow, 18-27/X, sometimes as much as 35/x long. Mycelium 

 diffused throughout the host-plant. 

 Teleutospores—'S,ox\ brown, few, small, scattered, elliptical or elon- 

 gate, long covered by the epidermis. Spores broadly oval, 

 often almost globose, slightly constricted, apex not thickened, 

 thickly verrucose, brown, 26-48 X 20-35/^. Pedicels short, 

 colourless, deciduous. Mycelium locahzed. 



Synonyms. 



Fuccinia tragopogi (^Qxs.). Winter in Rabh., " Krypt. Flor.," 

 vol. i. p. 209. 



JEcidium tragopgi. Pers., "Syn.," p. 211. Berk., " Eng. 

 Flor.," vol. V. p. 370. Sow., t. 397, fig. 2. Cooke, " Hdbk.," 

 p. 537 ; "Micro. Fungi," 4th edit., p. 195, t. i, figs. 1-3. 



.^cidhm cichoraceanim, D. C. Johnst., " Flor. Berw.," vol. ii. 

 ]). 205. 



Puccinia sparsa. Cooke, " Hdbk.," p. 498 3 " Micro. Fungi," 



4th edit., p. 205. 



Puccinia syngenesiarum, Link. Johnst., "Flor. Berw.," vol. 11. 



p. 197, in part. 



Exsiccaii. 

 Cooke, i. 5, 330 ; ii. 79 ; " L. F.," 51. Vize, " Micro. Fungi," 

 158 ; " Micro. Fungi Brit," 133. 



On Tragopogon pratensis. 

 April to September. 



Biology.— The life-history of this species was first worked out by 

 De Bary (" Champ, parasit.," Ann. Sc. Nat., 1861, 4th series, t. xx., 

 pp. 76 and 87-88 of the reprint). He found the aecidiospores to 

 have a colourless epispore, with three germ-pores ; that when they 

 were sown upon the young leaves of Tragopogon pratensis ^.nd. porri- 

 folius they gave rise to the teleutospores, with a locahzed mycelium at 

 the place where the secidiospores were placed. Mixed with the teleu- 

 tospores are a very few uredospores. The teleutospores give rise, 

 when placed upon young plants, to a mycehum, which pervades the 

 whole of the plant. The infected plants produce the aecidiospores on 

 the leaves, involucre, and receptacle. The mycelium is to be found in 

 the upper part of the root-stock. 



I have cultivated this fungus for several years. Sometimes the 



