Tree Crataegus × lavalleei [Lavalle Hawthorn] The Lavalle Hawthorn is a small, rounded tree that resulted from a cross of Crataegus mexicana and C. crusgalli. Quite resistant to rust and less thorny than its Cockspur Hawthorn parent.
Tree Indiana Native Crataegus mollis [Downy Hawthorn] Quite susceptible to cedar-hawthorn rust, with leaves heavily spotted with orange in some years. Rust limits usage in many areas. Large fruit pose a maintenance issue when they drop.
Tree Crataegus × mordenensis [Morden Hawthorn] This uncommon plant resulted from a cross between Crataegus laevigata 'Paul's Scarlet' and C. succulenta'. It has attractive clusters of double flowers and is highly resistant to hawthorn rust.
Tree Indiana Native Crataegus phaenopyrum [Washington Hawthorn] One of the finest small trees for winter color. The 1-3" thorns can be dangerous, especially around children. Fireblight, leaf spot, and cedar-hawthorn rust are among the worst problems, although more trouble-free than many hawthorns. Japanese beetles like to feed on hawthorns.
Tree Crataegus sp. [Hawthorn] The Hawthorn genus, Crataegus, is in the Rose Family, Rosaceae, and is a large genus comprised of about 200 species of generally deciduous and thorny trees and shrubs. Native to North America, Europe, and Asia, plants from this genus can be found growing wild in many parts of the world. Hawthorns are generally grown for their ornamental pink to white flowers and generally red fruits, which are useful for attracting wildlife. As overall quite tough…
Tree Crataegus × 'Vaughn' [Vaughn Hawthorn] This small tree is a hybrid of Crataegus crusgalli x C. phaenopyrum. It is generally grown for its fragrant clusters of white flowers in the spring and prolifically produced red fruits that persist into winter. Due to its numerous thorns, it is best used in areas with low traffic. Highly susceptible to rust.
Tree Indiana Native Crataegus viridis [Green Hawthorn] An attractive small tree with beautiful white flower corymbs and bright red persistent fruits. Very adaptable, although leaves are often badly infected by rust so that the entire plant appears to be suffering from the measles.
Tree Crataegus viridis 'Winter King' [Winter King Green Hawthorn] An attractive, nearly thornless vase-shaped small tree with beautiful white flower corymbs and large, bright red persistent fruits. This cultivar was discovered in a fence row by Bob Simpson in Vincennes, Indiana. Very adaptable, although leaves are often badly infected by rust so that the entire plant appears to be suffering from the measles.
Shrub Indiana Native Dasiphora fruticosa [Bush Cinquefoil] Extreme hardiness and long season of bloom make this a favorite in severe climates. Low stature and tolerance of poor, dry soils give it added usefulness in other areas also. Can develop a ragged, unkept habit over time. Remove 1/3 of canes each year (3-year pruning cycle), and consider renewal pruning to a very low framework every 3-5 years if needed.
Shrub Dasiphora fruticosa 'Abbotswood' [White Bush Cinquefoil] 'Abbotswood' has beautiful, large, white flowers and an especially long blooming period. Extreme hardiness and long season of bloom make Potentilla fruticosa a favorite in severe climates. Low stature and tolerance of poor, dry soils give it added usefulness in other areas also. Can develop a ragged, unkept habit over time. Remove 1/3 of canes each year (3-year pruning cycle), and consider renewal pruning to a very low framework every 3-5 years if needed.
