Acer × freemanii

Acer × freemanii, Freeman maple or Freeman's maple, is a naturally occurring hybrid maple that is the result of a cross between Acer rubrum (red maple) and Acer saccharinum (silver maple). Wild specimens are found in eastern North America where the parent species overlap. The species is named for Oliver M. Freeman of the U.S. National Arboretum who hybridized A. rubrum with A. saccharinum in 1933. The fall foliage is a striking orange-red. It has many commercially available cultivars and is frequently used as a street tree.

Acer × freemanii
Transitioning to autumn color
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Sapindaceae
Genus: Acer
Section: Acer sect. Rubra
Species:
A. × freemanii
Binomial name
Acer × freemanii
A.E. Murray[1]
Synonyms
  • Acer freemanii

Cultivars

The cultivars are typically deliberately hybridized and selected in nurseries, not drawn from the wild specimens. Usually infertile (a desirable trait in cultivated maples), they have stronger branch attachments than silver maples and faster growth rates than red maples.[2]

  • 'Armstrong', with a more yellow fall foliage
  • Autumn Fantasy
  • 'Celzam', trade name CELEBRATION
  • Firefall
  • 'Jeffersred', trade name AUTUMN BLAZE, recipient of the RHS's Award of Garden Merit[3]
  • 'Marmo', which does not produce seeds
  • 'Morgan' trade name INDIAN SUMMER
  • 'Scarsen', trade name SCARLET SENTINEL
  • Sienna Glen

Description

Even high-powered morphometric analyses of leaf shape cannot easily distinguish Acer × freemanii individuals from the parent species.[4] All that can be said is that Acer × freemanii is generally intermediate between the parents.

References
  1. Kalmia 1:2, 18. 1969
  2. "Freeman's maple". mortonarb.org. The Morton Arboretum. 2019. Retrieved 14 August 2019.
  3. "Acer × freemanii Autumn Blaze = 'Jeffersred'". RHS. Retrieved 15 August 2019.
  4. Jensen, Richard J.; Ciofani, Kristen M.; Miramontes, Lydia C. (August 2002). "Lines, outlines, and landmarks: morphometric analyses of leaves of Acer rubrum, Acer saccharinum (Aceraceae) and their hybrid". Taxon. 51 (3): 475–492. doi:10.2307/1554860. JSTOR 1554860. Retrieved 5 October 2019.
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