164 British Uvredinea and Ustilaginec. 
cylindrical, with whitish torn edges. Spores subglobose, very 
finely verrucose, orange-yellow, 15-25 X 12-18. 
Uredospores—Sori orange, pulverulent, elongated or linear, often 
confluent. Spores globose or ovate, with three or four germ- 
pores, echinulate, orange-yellow, 20-28 X 1520p. 
Teleutospores—Sori, persistent, black, linear, often confluent, long 
covered by the epidermis. Spores subcylindrical or cuneiform, 
attenuated below, constriction slight or absent, apex truncate, 
somewhat thickened, with six or seven curved blunt processes, 
brown, 40-60 X 12-20. Pedicels short, thick. 
Synonyms. 
Puccinia coronata. Corda, “‘Icones,” vol. i. p. 6, t. ii. fig. 96. 
Winter in Rabh., “ Krypt. Flor.,” vol. i p. 218, Schrot., “ Krypt. 
Flor. Schl.,” p. 323. Cooke, ‘‘Hdbk.,” p. 494; “ Micro. Fungi,” 
4th edit., p. 203, t. iv. figs. 60-62. 
Aicidium crassum, Pers, Berk., “ Eng. Flor.,” vol. v. p. 373- 
Pers., “Ic. et Descrip.,” t. 10, figs. 1, 2. Cooke, “Hdbk.,” 
538; “ Micro. Fungi,” 4th edit., p. 196. 
Aicdium rhamni. Pers., “ Obs.,” t. 2, fig. 4. Purton, “ Midl. 
Flor.,” vol. iii, No. 1538. 
Exsiccatt, 
Berk., t10. Cooke, i. 7, 26; i. 94,95; “L. F.,” 53. Vize, 
“‘ Micro, Fungi,” 116, 155; “ Micro. Fungi Brit.,” 210, 234. 
Ecidiospores on Rhamnus frangula and catharticus, May and 
June. 
Teleutospores on Aolcus mollis, Avena elatior, sativa, Festuca 
sylvatica, Lolium perenne, Dactylis glomerata, July to September, 
and throughout the winter. 
B1oLoGY.—Nielsen found that when the ecidiospores from Rham- 
nus frangula and cathartica were placed on Lolium perenne, the latter 
only gave rise to uredospores, and that these uredospores, put on 
Avena sativa, reproduced the uredospores and subsequently the teleu- 
tospores of P. coronata. I have found, by numerous cultures, that the 
teleutospores from Dactylis glomerata and Festuca sylvatica readily 
produced the zcidium on &. frangula, but I have failed to produce 
on &. frangula the zecidium from the teleutospores on Lolium perenne. 
I think two species are confounded under the name P. coronata. As 
