English hawthorn (Crataegus laevigata) is very susceptible, including the red-flowered cultivars 'Paul's Scarlet' and 'Crimson Cloud.' This fungus overwinters on dead leaves and young twigs.

If you’re hooked on red flowers, the English hawthorn ‘Crimson Cloud’ (Crataegus laevigata ‘Crimson Cloud’) is resistant to the disease and offers fiery clusters of single red flowers ...

Most years, the Juneau Urban Forestry Partnership and the Juneau Garden Club carry out their own events for Arbor Day. This year, they combined forces, planting a Crimson Cloud Hawthorn tree at ...

The other trees planted included two crimson cloud hawthorn, two serviceberry and two crabapple. Each year Stone presents an “Arbor Day Rhyme” for those in attendance, and Thursday was no different.