Cedar apple rust
MAY
Heptacodium leaf
Cedar quince rust
Gymnosporangium is a genus of rust fungi that includes a number of different species. In fact, Gymnosporangium sabinae, the cause of pear trellis rust, is one I did not learn of until I saw it this year in central Ohio. The rust pictured here is cedar quince rust, caused by Gymnosporangium clavipes. This fungus cycles between junipers and rosaceous hosts such as hawthorn and differs from cedar apple rust caused by Gymnosporangium juniperi-virginianae in that it does not have large galls and fungal horns like cedar apple rust and on hawthorn is most evident on fruits and stems rather than leaves. May also brought us healthy plants, such as Heptacodium with its attractive leaves that appear to have an “inner willow leaf” and the beautiful red buckeye (Aesculus pavia) which has been christened “scarlet” buckeye at Ohio State’s Secrest Arboretum. Visit Secrest at the Ohio Agricultural Research and Development Center in Wooster and check out the new signage and the welcoming wisdom of Joe Cochran, Paul Snyder, and Matt Schultzman. Scarlet or red buckeye