512 ON THE LIFE-HISTORY OF JECIDIUM BELLIDIS. 
is incorrect, and that this Zcidium is a true heterecismal Uredine. 
This ZEcidium differs from its allies in the time it appears, namely 
during the late autumn and winter months, from November to 
January. It has been made the subject of special observation for 
many years past, as it recurs annually upon its host-plant in four 
localities near Kings Lynn, and is never accompanied by any 
other spore-form upon the same plant. During the past four 
months these localities have been frequently visited, and the 
daisies, as well as the other plants growing near them, carefully 
from time to time examined, with the view of discovering its life- 
history. The subjoined cultures were then made ; the only point 
about which calling for remark is the length of time which elapsed 
between the placing of the promycelial spores upon the host- 
plant and the subsequent appearance of the spermogonia. In 
most Uredines only about a week or ten days elapse before the 
parasite makes its presence visible. In this case, however, the 
interval was considerably longer: doubtless this is due to the 
fact that all the processes of vegetation are carried on much more 
slowly during the winter than is the case in summer. The same 
remark applies to the production of the uredospores upon Luzula 
campestris from the ecidiospores. 
The ZEcidiwm is not a very common species, and has always 
hitherto been met with in grassy pastures. 
Two Puccinié occur upon various species of Luzule: one, 
already known as British, has smooth elliptical uredospores, P. 
oblongata (Link)— P. Luzule, Lib. The other, not previously 
recorded from this country, P. obscura, Schrót., which has sub- 
globose rough uredospores, is connected with ZEcidium bellidis. 
Date of first 
Ex Plant infected Infecting Date of appearance of 
P- : material. infection. uredo. 
235... Luzula campestris. Æcidium bellidis. 19 Nov., 1883. 20 Jan. 1884. 
a Date of Date of appa ae 
. nfecting infection. spermogonia. secidiospore. 
Exp. Plant infected. ate 1883. P 1a 2i 1884. 
237 Bellis perennis. Puccinia obscura. Dec. 12. Jan. 6. Jan. 25. 
238 ” 2 DEI » Dec. 12. Jan. 6. Jan. 25. 
289 , » » 5 Dec. 12. Jan. 6. Feb. 8. 
240 » » Dm » Dec. 12. Jan. 6. Jan. 26 
