162 British Uvredinee and Ustilaginec. 
spores are colourless, comparatively small, and produced from the 
hyphz in basipetal chains (Plate II. Figs. 11-14). They emit a germ- 
tube, which usually exhibits circumnutatory motions. The primary 
uredospores occur with the zcidiospores, and resemble the secondary 
in form, but are much more profuse. The secondary uredospores and 
teleutospores have localized mycelia (Plow., Gard. Chron., July 25, 
1885, p. 108, figs. 22, 23). 
B. HETERopPUcCINIA. Schrot. 
Spermogonia and zcidiospores 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. 
Uredospores—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. 
Teleutospores —Sori 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 (8-10), rounded or pointed, 
smooth, chestnut-brown, 35-65 x 15-20. Pedicels long, 
persistent, yellowish brown. 
Synonyms. 
Puccinia graminis. Pers. ‘ Disp. Meth.,” p. 39, t. 3, fig. 3. 
Winter in Rabh., “ Krypt. Flor.,” vol. i. p. 217. Cooke, “ Hdbk.,” 
Pp. 4933. “ 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 frumenti. 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. 
