Here is a common sight in poison ivy country, which is much of the United States, east of the Rocky Mountains. Poison ivy loves to

While searching for poison ivy books at Alibris, my favorite online bookshop, I came across this terrific book by Cynthia Riggs, who has written a

I was able to find poison sumac (on Martha’s Vineyard) in the winter, but only because I used the iNaturalist app to see if it