276 
appeared in two of the infected plants. The check plants remained free from the 
fungus, as did 33 other individuals of Carex hirta growing in the same garden. 
PUCCINIA MAGNUSIANA AND ACIDIUM RUMICIS. 
Exp. 18.—Two plants of Rumex hydrolapathum and two of P. obtusifolium 
were planted in a large flower pot, and surrounded with leaves of Phragmitis 
communis, on which the teleutospores of last year’s Puccinia magnusiana, were 
abundant. The pot was covered with a bell-glass, and freely watered. On 3rd 
June red spots appeared on the leaves of the R. hydrolapathum, which, by the 6th 
June, developed into perfect Jcidium rumicis. No dicidia appeared on the R. 
obtusifolium. 
Exp. 32.—Three plants of Rumex hydrolapathum were similarly surrounded 
with reed leaves on 15th May. On 6th June perfect Acidium rumicis was devel- 
oped on all three plants. 
AQCIDIUM RHAMNI AND PUCCINIA CORONATA. 
Exp. 55.—A flower pot of seedling oats were infected on 7th June with 
cidium rhamni. On the 10th July there was an appearance like Uredo. On 10th 
August the Uredo of Puccinia coronata was gathered. 
Exp. 76.—A number of oat seedlings were on 28rd June infected with 
Acidium rhamni. On 12th June Uredo of P. coronata appeared. 
ARCIDIUM TUSSILAGINIS AND PUCCINIA POARUM. 
Exp. 84.—Four plants of Poa annua were on 29th July infected with #eidium 
tussilaginis. On 10th July Uredo appeared, and on the 18th the perfect Puccinia, 
which had hitherto not been recorded as British. 
Exp. 85.—Three plants of Poa annua were on the 29th June infected with 
Aicidium tussilaginis. On 10th July the Uredo and on the 18th the Puccinia 
appeared. ; 
Exp. 86.—A number of plants of Poa annua in a pot were infected with the 
Acidium on 29th June. On 10th July the Uredo, and on the 18th July the 
Puccinia appeared.* 
UROMYCES JUNCI AND AXCIDIUM ZONALE. 
Exp. 40.—Germinating Uromyces junci was on the 25th May placed on three 
plants of Inula dysenterica. On 4th June yellow spots appeared on all these plants, 
which by the 21st developed into perfect Mcidiwm zonale. 
Exp. 42.—Germinating Uromyces junci was placed on two plants of Inula 
dysenterica on 29th May. On 12th June abundant yellow spots were noticed, 
which by the 21st had developed into perfect cidium zonale. 
Exp. 64.—Three plants of Inula dysenterica were on 8th June infected with 
Uromyces junci; by 30th perfect Acidium zonale was abundantly produced on all 
_ * Note Poa annua is a common weed in the garden in which these experiments were performed, 
as it is in every garden, but on no other plant of this grass could the Puccinia be found, although 
ae search was made, except those upon which the spores of 4cidium tussilagints had been 
placed. 
