More educational pictures of this rust fungus. Note: the last picture may make some folks a little squeamish....
Here is the whole hawthorn leaf with the rust spots. Not sure if this is the image I used to make the banner.
Next is the rust fungus as it appears on juniper. This is called a gall.
Finally, in the spring when there is rainy weather, these galls sporulate and produce these orange gelatinous fingers
which will produce the fungal spores that infect the apple, hawthorn, pear, or whatever the alternate host is.
