264 PUCCINIA 
membrane marked with about nine (7—10) germ-pores, which are each 
surrounded by a little thickening of the cell-wall, so that they look some- 
what like a “ bordered pit” ; the teleuto-sori mostly on the lower leaf-surface 
or sheath, black, covered by the epidermis ; the teleutospores obconical or 
with nearly parallel sides, truncate, rounded, or pointed (obtusely and 
often obliquely) at the apex; the slightly thickened apical wall and a 
broad band at the base chestnut-brown, but the remainder rather pale ; 
each little group of teleutospores surrounded by a dense wall of brown 
closely coherent “paraphyses.” Oftentimes there are numerous meso- 
spores, especially on the margin of the sorus. The clavate paraphyses 
which are frequently present in the uredo-sori of other forms of P. dispersa 
Fig. 201. P. agropyrina. a, teleutospores; b, paraphyses with the same; 
c, plan of paraphyses; d, paraphysis with uredospores ; ¢, uredospore. 
are mostly absent in this; when present they have a thin brownish 
membrane exactly of the same colour as that of the uredospores. This 
fungus is as distinctively an autumn parasite as P. glumarum is a spring 
one on the same hosts. 
(6) Puccinra TrisEtr Erikss. 
Puceinia Triseti Evikss. Ann, Sci. Nat. ser. 8, ix. 277, pl. xiii, f. 26—9 
(1899). Sydow, Monogr. i. 716. Fischer, Ured. Schweiz, p. 364. 
Klebahn, Zc. p. 249. 
.On TLrisetum flavescens. Uncommon ; Alvechurch, Hereford, 
etc. June—October. P. graminis occurs on the same host. 
(7) Puccinta simpLex Er. et Henn. 
Puccinia simples E. et H. Getreideroste, p. 258 (1896). Sydow, 
Monogr. i, 756. Klebahn, Zc. p. 248. Fischer, Ured. Schweiz, 
p. 368, f. 266. McAlpine, Rusts of Australia, p. 130, pl. i, f. 1, 
4, 9 and pl. B, f. 9, 10 (introduced in 1902). 
P. Rubigo-vera var. simplex Korn. ; Plowr. Ured. p. 168. 
