ALGjE. 
109 
have had the experience of the veteran algologist, and one can only 
receive with respect his views upon classification, even if they 
conflict with those of algologists with younger eyes, and educated 
with all the advantages of modern science, and with the experience 
of previous observers to guide them. 
E. M. Holmes. 
FUNGI. 
Experimental Researches on the Life History of Certain 
Uredinem. 
By Dr. C. B. Plowright. 
Puccinia festucae. 
JEJcidio spores = Mcidium periclymeni, Schum. 
Uredospores. Sori hypophyllous, causing conspicuous yellow 
spots on the upper surface of the leaves, oblong, bright yellow or 
orange yellow. Spores subglobose, colourless, echinulate, contents 
yellow, 25-30 p. 
Teleuto spores. Sori hypophyllous, linear or oblong, brownish 
black. Spores clavato-cylindrical, constricted, summit surmounted 
by a crown of from four to six obtuse, curved processes, which are 
sometimes bifid at their extremities. Lower cell cuneiform, 
attenuated below, sometimes abortive, 40-60 x 15-23 p, average 
50 x 20 p, pedicels rather long, brown, persistent, 15-25 X 
10-12 p. 
iEcidiospores on Lonicera periclymenum. Uredospores and 
teleutospores on Festuca ovina and duriuscula. 
The life history of the secidium on honeysuckle has long remained 
a mystery. As early as 1881 I began to make experimental 
cultures with its spores, but until the summer of 1890 without any 
definite result. In the aggregate my experimental cultures with 
this species number 34. Amongst the various grasses to which the 
spores were applied ar e Molinia coerulcea, Poa compressa, pratensis, 
Anihoxanthum odoratum , Nardus stricta , and Luzula, but without 
success. On searching the grasses near affected plants of Lonicera 
I upon one or two occasions found Festuca ovina affected with a 
Puccinia resembling P. coronata, but always in such small quantities 
that it seemed hardly worth an experimental trial. In 1885, how- 
ever, I applied the germinating spores of P. coronata on Holcus 
mollis in four experiments to Lonicera leaves and once to Pham- 
nus frangula. The ascidiospores were produced on the Rhamnus 
but not upon the Lonicera. In 1889 and 1890 I was fortunate 
enough to find a locality in which the iEcidium occurred abundantly 
on Lonicera and where I was enabled to collect a fair quantity of 
Festuca ovina with the Puccinia upon it. This was germinated in 
