Acer platanoides Crimson Sentry™
Common name: 
Crimson Sentry Norway Maple
A-ser plat-an-OY-dez
Sapindaceae, Aceraceae
Native to (or naturalized in) Oregon: 
  • Broadleaf deciduous tree, compact, narrow, to about 25 ft tall and 15 ft wide (7.5 × 4.5 m), very dense, initially columnar, later pyramidal to oval.   Leaves opposite, simple, purple-maroon; reddish bronze in fall.
  • Sun.  Slow growing.  In western Oregon the trees appear rather susceptible to powdery mildew, a fungal disease.  This is especially noticeable in mid- to late-summer.  The affected leaves become a dull maroon color followed by a white-gray color, as if dusted with powdered sugar.  One authority suggested that Crimson Sentry™ should not be recommended for mass or street plantings "unless a ghostly pallor on purple foliage is actually wanted".  Possibly by opening the tree's canopy (pruning) and/or selecting a planting site with good air movement will lessen the disease.
  • Hardy to USDA Zone 4        From a bud sport of 'Crimson King" in 1970 in the A. McGill & Son nursery, Fairview (now near Hubbard), Oregon.  Plant Patent, PP03258, awarded in 1972.
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  • plant habit

    plant habit

  • new leaves

    new leaves

  • leaf