1 62 British UredinecE and Ustilaginecs. 



spores are colourless, comparatively small, and produced from the 

 hyphae in basipetal chains (Plate II, Figs. 11-14). They emit a germ- 

 tube, which usually exhibits circumnutatory motions. The primary 

 uredospores occur with the cecidiospores, and resemble the secondary 

 in form, but are much more profuse. The secondary uredospores and 

 teleutospores have localized mycelia (Plow., Card. Chron., July 25, 

 1885, p. 108, figs. 22, 23). 



B. Heteropuccinia. Schrot. 



Spermogonia and recidiospores on one host-plant ; the uredospores and 

 teleutospores on another, belonging to a different genus. 



Puccinia graminis. Pers. 



^cidiospores — Spots generally circular, thick, swollen, reddish 

 above, yellow below. Pseudoperidia cylindrical, with whitish 

 torn edges. Spores subglobose, smooth, orange-yellow, 

 15-25/* in diameter. 



Ut-edospores — Sori orange-red, linear, but often confluent, forming 

 very long lines on the stems and sheaths, pulverulent. Spores 

 elliptical, ovate, or pyriform, with two very marked, nearly oppo- 

 site germ-pores, echinulate, orange-yellow, 25-38 x 15-20/1,. 



Teleutospores —'$>ori persistent, naked, linear, generally forming lines 

 on the sheaths and stems, often confluent. Spores fusiform 

 or clavate, constricted in the middle, generally attenuated 

 below, apex much thickened (8-io/x), rounded or pointed, 

 smooth, chestnut-brown, 35-65 x 15-20U. Pedicels long, 

 persistent, yellowish brown. 



SynonyjHs. 



Puccinia graminis. Pers., " Disp. Meth.," p. 39, t. 3, fig. 3. 

 Winter in Rabh.," Krypt. Flor.,"vol. i. p. 217. Cooke, " Hdbk.," 

 p. 493; "Micro. Fungi," 4th edit., p. 202, t. iv. figs. 57-59. 

 Grev., Berk. " Eng. Flor.," vol. v. p 363; " Flor. Edin.," p. 433. 

 Johnst, "Flor. Berw.," vol. ii. p. 195. 



Uredo frtimenti. Sow, t. 140. 



Uredo linearis, Pers. Berk., " Eng. Flor.," vol. v. p. 375. 

 Grev., "Flor. Edin.," p. 440. Johnst., "Flor. Berw.," vol. ii. 

 p. 198. 



