Acer circinatum 'Monroe'
Common name: 
Monroe Vine Maple
A-ser sir-SIN-in-a-tum
Sapindaceae, Aceraceae
Native to (or naturalized in) Oregon: 
  • Deciduous tree, 10-13 ft (3-4 m), multi-stemmed, shrubby, wide spreading, wider than tall, stiff, purplish branches.  Opposite, simple leaves, 6-10 cm wide, seven-lobed, deeply incised to the base, yellow in fall.
  • Sun or deep shade
  • Hardy to USDA Zone 5
  • Found by Warner Monroe of Portland in the headwaters of the McKenzie River in the Cascade Mountains of Oregon.  He layered the plant, brought it into cultivation, and later it was registered.  It was named by Brian Mulligan, former director of the Washington Park Arboretum, Seattle (Jacobson, 1996; van Geldereen and van Geldereen, 1999).  
Click image to enlarge
  • plant habit, spring

    plant habit, spring

  • new leaves, late spring

    new leaves, late spring

  • leaves, summer

    leaves, summer

  • leaves, early fall

    leaves, early fall