Ne ee ee eee 
1918.] Observations on the rust on Launea aspleniifolia DC: 251 
celium ; the specks turned out to be young pycnidia. 
ntrary to the observation made by Doctors Cunningham 
and Prain the ripe aecidia were not observed by the fifth day, 
nor did the shoot “damp off.’ On the 20th of February (a 
were undoubtedly the unopened aecidia. The pycnidia now 
looked brown, Even after another month and a half no sori 
appeared on the other shoot in the same pot. On being re- 
moved and cut into sections its rootstock showed the mycelium 
mostly localized along the peripheral portion. On the outside 
the rootstock showed a few knots or collections of funga 
hyphee like those found beneath the sori on leaves. From the 
third pot no shoot came out, probably on account of bad trans- 
planting as there was no trace of the rootstock even within the 
soil. No diseased shoot appeared in any one of the half a 
dozen pots into which healthy plants had been transplanted on 
the same day as the diseased ones. The new shoot in the 
— pot was properly protected against fresh infection from 
e air. ¢ 
teleuto sori. Or again it is not uncommon to see an aecidial 
shoot coming out separately from the rootstock. As stated 
_ above, some of the branches of the rootstock end in aecidial, 
and others in uredo and teleuto shoots. They are present at 
the same time and are practically of. the same age. One occa- 
sionally comes across cases with aecidia cups and uredo sori on 
the two sides of the same leaf. 
ll these irregularities are due to the fact that the various 
Stages are not the outcome of fresh infection but that the new 
shoots which arise from diseased rootstocks get infected with 
mycelium within those parts. 
