The wall thin; the vesicles with a dark polygonal outline, disposed in thin irregular reticulate patches, which are more or less confluent.
"The Myxomycetes of the Miami Valley, Ohio"
A. P. Morgan
Sporangia subglobose, sessile, gregarious, scattered, or sometimes close and confluent; the wall thickened with minute scales, reddish-brown in color.
"The Myxomycetes of the Miami Valley, Ohio"
A. P. Morgan
If calves are allowed to suckle the cows the pustules become confluent, and the ulcerations may extend up into the teat, causing garget and ruining the whole quarter of the udder.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler