ON GRAMINEX 255 
species and is accompanied by few uredospores, while that on Loliwm 
perenne (P. Lolit) occurs only in the autumn with a profuse simultaneous 
development of uredospores. This agrees with my experience. Never- 
theless, I consider that P. coronata and P. Lolii ave merely biological 
forms of one species. The experiments of Carleton, in the United States, 
have shown that the distinctions of hosts are quite insufficient to dis- 
criminate the two forms ; among others he succeeded in infecting a host, 
stated hy Eriksson to be confined to P. coronata, with spores from a host 
belonging to 2. Loliz. 
P. Festucae Plowr. belongs to the same group, but has its acidium on 
Honeysuckle. Crown Rusts have been found in Europe on many other 
species and genera of grasses (Sydow, i. 705), but they cannot, in the 
absence of cultures, be even temporarily arranged under the two heads. 
Barclay described a form from Simla (P. coronata var. himalensis) on 
Brachypodium silvaticum with its ecidium on Rhamnus dahurica ; this 
has since been raised by Dietel to a species (P. himalensis). , 
It is a remarkable fact that the only other species of Puccinia known, 
provided with the same processes, are two (P. Mesnieriana=digitata, and 
P. Schweinfurthit) whose teleutospores occur on Rhamnus. A somewhat 
similar form, but with much longer apical processes, is found on Lonicera 
in Turkestan (P. longirostris Kom.). These instances are similar to those 
of P. fusca and P. Pruni-spinosae already mentioned and can be explained 
in the same way ; see Grove, New Phytologist, 1913, p. 89. 
119. Puccinia Lolii Nielsen. 
eidium erasswm Pers. ; Cuoke, Handb. p. 538 ; Micr. Fung. p. 196 PP, 
44, Cathartici Schum. Pl. Sal. ii, 225. 
Puccinia coronata Corda ; Cooke, Handb. p. 494 ; Micr. Fung. 
D- 203 p.p. Plowr. Ured. p. 163 p.p.  Sacc. Syll. vii. 623 p.p. 
P. Lolti Niels. Ug. for Landmaend. i.549 (1875). Sydow, Monogr. i. 
704, McAlpine, Rusts of Australia, p. 123 and many figures. 
P. coronifera Kleb, Zeitsch. f. Pflanzenkr. iv. 132 (1894). 
Fischer, 
Ured. Schweiz, p. 375, f. 271. 
Ajcidiospores. Kcidia hypophyllous or on the petioles, 
seated on yellow or purplish spots, scattered or arranged in 
groups, producing distortion of the parts, cylindrical, with a- 
whitish torn revolute margin; spores very delicately verrucu- 
lose, orange, 16—25 x 12—20 wu. 
Uredospores. Sori amphigenous, scattered or in large 
patches, forming blister-like swellings, minute, sometimes con- 
fluent, lanceolate or more or less oblong, pulverulent, orange ; 
spores globose to obovate, echinulate, yellow, 18—27 x 16—24,y, 
Ca 
