784 General Notes. (July, 
be found on Anemone nemorosa and Thalictrum. The affected 
leaves are easily recognized by the pale or faded spots on their 
upper surface, on which may be seen with the lens the minute 
spermogonial pustules, and on turning the leaf the cluster of 
cups, light colored and mealy outside and bright orange-yellow 
within, will at once be seen. Another form occurs on the Ranun- 
culus abortivus, which was named by Schweinitz Æcidium ranun- 
culi, but which he afterwards united with the first-mentioned 
species. It differs from the ordinary form in the cups being 
rather larger and less prominent, and perhaps of a deeper color 
inside, but more especially in having the cups quite evenly dis- 
tributed over the lower face of the leaf, and not collected in 
clusters. 
The leaves of the blue forget-me-not (Houstonia cerulea) also 
now begin to show a very beautiful little A®cidium (A. Aoustom- 
atum Schw.), of which the cups are much smaller than those of 
the species on Ranunculus, and more inclining to red inside. 
They are also more evenly scattered over the under surface of the 
leaves, which are scarcely discolored above. There is also now 
to be found on the leaves of the spring beauty (Claytonia) a very 
fine little Æcidium, which will be succeeded a little later by 4 
Puccinia. 
In June there will be found on the leaves of the common bar- 
berry bush (Berberis vulgaris) another Æcidium, which has been 
proved by actual experimental cultures to be only one stage 
common dandelion (Taraxacum dens-leonis) is to The 
gus 
th sur 
tured epidermis of the leaf. This dust is the spores of 4 A the 
which is the forerunner of a Puccinia that will appear later hence 
season on the leaves of various composite plants, and has ae 
been called Puccinia compositarum. These Uredo sports 
: 
