PHRAGMIDIUM 293 



70x21 — 24 fi; about three germ-pores, to each cell; pedicels 

 hyaline, rather short. 



On Poterium Sanguisorba. Rather common. Caeomata, 

 April — June ; teleutospores, July — November. (Fig. 221.) • 



Distribution : Europe, Algeria, Asia Minor,- Turkestan. 



4. Phragmidium disciflorum James. 



Ascophora disciflora Tode, Fung. Meek. sel. i. 16 (sec. Sydow). 



Coleosporium pingue Lev. ; Cooke, Handb. p. 520 ; Micr. Fung. p. 217. 



('. miniatum Pers. ; Cooke, Micr. Fung. p. 217. 



Lecythea Rosae Lev. ; Cooke, Micr. Fung. p. 221, pi. 3, f. 37. 



Phraginidium hullatum West. ; Cooke, Micr. Fung. p. 202. 



P. mucronatum Fr. ; Cooke, Handb. p. 490 ; Micr. Fung. p. 201, pi. 3, 



f. 38. 

 P. subcorticium Wint. Pilze, p. 228. Plowr. Ured. p. 224. Fischer, 



Ured. Schweiz, p. 400, f. 281. Sacc. SylL vii. 746 p.p. McAlpine, 



Rusts of Australia, p. 188, f. 229—233, and pi. I, f. 37. Arthur, 



N. Amer. Flor. vii. 172. 

 P. disciflorum James, Contr. U.S. Nat. Herb. iii. 276. Sydow, Monogr. 



iii. 115. 



Spermogones. Flat, subcuticular, pale honey-yellow. 



jEcidiospores. Caeomata on branches, petioles, leaf-nerves 

 and fruits, often confluent on the branches for long distances, 

 on the leaves mostly roundish, bright-orange ; the smaller ones 

 are surrounded by a circle of clavate, thin-walled, colourless 

 paraphyses ; spores in short chains, verruculose, orange-yellow, 

 24—28 x 18—21 fx. 



Uredospores. Sori hypophyllous, very small, scattered, 

 round, soon naked, pale-orange, surrounded by a circle of 

 clavate, curved, colourless paraphyses ; spores ellipsoid or ovate, 

 yellow, echinulate, 21 — 28 x 14 — -20 /x, with numerous germ- 

 pores. 



Teleutospores. Sori similar, but black ; spores ellipsoid to 

 subfusiform-cylindric, of 6 — 8, rarely five or nine cells, with a 

 pointed papilla which is pale above and darker and scabrous 

 below, not constricted, rounded at base, unevenly warted, red- 

 brown, then blackish-brown, 65 — 120x30 — 45 yu.; each cell 

 with two or three germ-pores ; pedicels colourless, persistent, 

 about as long as the spore, swollen at the base. 



