258 British Uvedinee and Ustilaginee. 
BIOLOGY.—This species occurs upon various species of cultivated 
iris. To Dr. M. Foster, F.R.S., I am indebted for numerous speci- 
mens. Repeated examinations at various periods of the year, both on 
the part of Dr. Foster and myself; have failed to’ show teleutospores. 
When applied to J. pseudo-acorus and fetidissima, | have almost 
always failed in obtaining any results. Thiimen’s specimen in ‘my 
copy consists only of uredospores, and is on /, favissima from Siberia. 
Rabenhorst’s Uredo tridis on I. pumila (“ Fung. Europ.,” No. 1674) 
seems to be the same plant. Dr. M. Foster says, “It came out with 
me first-on J. flavissema, then on J. tolmieana; then on &. zberica, 
and all the irises from Central Asia; also on J. spuria;: ensata ; 
finally on J. decora, kingii, pumila, filifolia, and caucasica. It does 
not readily attack the broad-leaved Mediterranean forms, such as 
I. germanica, pallida, etc. ; but I am inclined to think that almost 
every spécies would take it. I have not yet, however, seen it on 
I. fetidissima or pseudo-acorus.” 
Uredo phillyresz. Cooke. 
Sori yellow, rounded or elliptical, on’ yellowish spots, solitary or in 
clusters. Spores subglobose, ovate, finely echinulate, orange- 
yellow, 15-18 X 12-15. 
Synonym. 
Uredo phillyree. Cobdke, Exs: 
Exsiccati. 
Cooke, i. 592. Vize, “ Fungi Brit.,” 142. 
On Phillyrea medéa. 
Uredo tropxoli. Desm. 
Hypogenous spots, pale yellow. Sori minute, roundish, scattered 
or confluent. Spores ovoid or subglobose, orange. 
Synonym. 
Uredo tropeolt. Desm., Ann. Nat. Sc., 1836; vol. vi. ps 243: 
Cooke, Seem. Jour. Bot., vol. iv. p. 97; “Hdbk.,” p. 5285 
“Micro. Fungi,” 4th edit., p. 216. 
