Tree InvasiveThis plant is considered invasive Pyrus calleryana 'Aristocrat' [sold as Aristocrat®] [Aristocrat Callery Pear] Aristocrat is one of the better performing Callery Pear variants. Flowers are malodorous, but the later blooming Aristocrat flowers are not as often killed by late spring freezes as are the flowers of other P. calleryana variants. Some fireblight susceptiblity, especially in the south. The branching of Aristocrat is more horizontal and does not form as narrow crotch angles as many other Callery Pears. Very small fruits are a litter problem when abundant. Considered invasive…
Tree Pyrus salicifolia [Willowleaf Pear] The Willowleaf Pear is an uncommon, but elegant tree with arching branches covered with silvery, narrow, willow-like foliage. Attractive clusters of white flowers appear in the spring. Severe fireblight susceptibility.
Tree Quercus bicolor 'Bonnie and Mike' [sold as Beacon®] [Beacon Oak] 'Bonnie and Mike' is a cultivar with dense and glossy green foliage. Good for urban use with its tight upright columnar branching. It also has yellow fall color.
Tree Indiana Native Quercus coccinea [Scarlet Oak] Excellent scarlet fall foliage, comparable if not often better than the Pin Oak. Does not suffer iron chlorosis as bad as Pin Oak, being more tolerant of alkaline soils. Some report difficulty in transplanting.
Tree Quercus × 'Crimschmidt' [sold as Crimson Spire™] [Crimson Spire Oak] The Crimson Spire Oak is notable for its powdery mildew resistance and reddish fall color that it gained from its White Oak parent, in addition to the dense, strong, vertical, columnar form, and tolerance to drought and urban conditions gained from its Fastigiate English Oak parent.
Tree Indiana Native Quercus ellipsoidalis [Northern Pin Oak] Quercus ellipsoidalis is very closely related to Q. palustris (Pin Oak), but is better suited for the Midwest. Very similar to the Pin Oak, the Northern Pin Oak is a handsome tree with distinctive and regular branching, spreading to horizontal to drooping, from top to bottom of the tree. This effect is partly lost when lower limbs must be removed for traffic underneath. While this species is still prone to chlorosis (yellowing of leaves) in…
Tree Indiana Native Quercus imbricaria [Shingle Oak] Somewhat tolerant of city conditions. Can be pruned into a hedge. Leaves persist into winter, after the normal leaf raking period, and then fall. Oak gall susceptible, but a minor problem.
Tree Indiana Native Quercus montana [Chestnut Oak] Naturally grows in rocky places and poor, dry sites. Dislikes poor drainage. Bark has the highest tannin content of any Quercus species.
Tree Indiana Native Quercus palustris [Pin Oak] Handsome tree, distinctive for its regular branching, spreading to horizontal to pendulous, from top to bottom of the tree. This effect is partly lost when lower limbs must be removed for traffic underneath. Requires an acidic soil and is subject to severe iron chlorosis on calcareous soils. This can be corrected but it means additional maintenance.
Tree Quercus palustris 'Crownright' [Crownright Pin Oak] Handsome tree with a more upright habit that lacks the pendulous character of the lower branches seen in the species type. Requires an acidic soil and is subject to severe iron chlorosis on calcareous soils. This can be corrected but it means additional maintenance.
