Hoyt Arboretum, Portland, Oregon, USA

Family: Sapindaceae

Distribution: Garden Origin

Hardiness: Zone 6a -10 to -5 F

Life form: Deciduous shrub

Usage: Ornamental selection of PNW native

Comments: With the striking fall color found in the native vine maple but this form has a rather unusual leaf and broad compact growth. Dr Warner Monroe an avid hiker of the McKenzie river area discoverd a vine maple with deeply dissected leaves near the headwaters of the river, in the Cascade Range of Oregon, made cuttings and it was intridcued to the ornamental plant world in 1965. It was named in Dr Monroe's honor by Brian Mulligan former director of the Washington Park Arboretum.
A large shrub or small tree reaching ten to thirteen feet in height, it is noted for leaves being dissected to the base of their seven lobes.