What does that mean?

What is important to know about them? What are some good cultivars for urban use?
  • Autumn Blaze hybrid maple (Acer x freemanii ‘Jeffersred’). Combines the fall leaf color of red maple with the urban soil tolerance of silver maple.
  • Greencolumn black maple (Acer nigrum ‘Greencolumn’). A narrower, hardier and more drought tolerant cousin of sugar maple, with the same fall color.
  • Prairie Pride hackberry (Celtis occidentalis ‘Prairie Pride’). Selected for strong central leader and resistance to disfiguration by insects.
  • Patmore green ash (Fraxinus pennsylvanica ‘Patmore’). Seedless, very cold hardy, and excellent branch structure.
  • Princeton Sentry ginkgo (Ginkgo biloba ‘Princeton Sentry’). Fruitless male tree, very tolerant of urban conditions, narrower than the species.
  • Skyline honey locust (Gleditsia triacanthos inermis ‘Skycole’). Strong central leader, easy to raise for clearance, somewhat more resistant to insects.
  • Macho Amur cork (Phellodendron amurense ‘Macho’). Upright habit, smaller stature, and no seeds.

  • Autumn blaze maple
                                                                     Autumn blaze maple
                                                                                           (Source: http://www.dawesarb.org/images/Acerfreemaniiautumnblaze_fall.jpg)

    Where can I find these cultivars? Where can I get more information?

    Gerhold, Henry, et al.  2002.  Landscape Tree Factsheets.  University Park PA: Penn State Press.  Excellent photos and descriptions of many cultivars.  For other information, advice and help on this topic, call offices of your State Urban Forestry Coordinator or University Extension service, visit urban forestry web sites.