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develops slightly flaking bark, creating a trunk mottled with beige, <br /> pink and gray. (1615 Oak Street, in parking lot south of building, two <br /> 30 -yr -old trees; NW corner of W 12th and Hayes, two new trees) <br /> JAPANESE ZELKOVA (Zelkova serrata), crown spread - 40'+ <br /> A relative of our more familiar elms, the zelkova does well in our <br /> climate, and even seems to tolerate the heavier soils of some neighbor- <br /> hoods, though it does best on the better soils. Its attractive, <br /> scalloped leaves can be quite showy in fall. Most individuals have a <br /> broad - spreading, flat - topped crown when young, with mostly ascending <br /> main branches. (19 -- Willamette, several 10 -yr -old trees) <br /> S MALL -CAN 0 P Y BROADLEAF TREES (<30 feet in 50 years; i.e., suitable <br /> under electrical distribution lines) <br /> FIELD MAPLE (Acer campestre), crown spread - 30' <br /> This little -known maple from the forests of western Europe grows very <br /> well in the Willamette Valley. Its relatively small, dark -green leaves <br /> grace a shapely, globose canopy; the foliage turns yellowish in fall. <br /> The tree is attractive in winter, too, as its young branches are lined <br /> with curious corky ridges, not unlike some sweetgums. In spring, it <br /> produces abundant clusters of sweetly- scented, yellow -green flowers. <br /> (several young trees along W side of River Rd, btw Lindner and Maynard) <br /> LAVALLE HAWTHORN (Crataegus x lavallei), crown spread - 20' <br /> Of hybrid origin, the lustrous, dark green leaves of this species remain <br /> vibrant into late fall,when they turn orange -red before dropping. Showy <br /> white flowers in mid -May are followed in late summer and fall by <br /> clusters of shiny red fruits. Like most hawthorns, it tolerates heavy <br /> clay soils; unlike most hawthorns, it is seldom afflicted with disease <br /> and does not produce watersprouts ( "suckers ") in the canopy. (2163 <br /> Harris St; 25 -yr -old trees) <br /> GOLDENRAIN TREE (Koelreuteria paniculata), crown spread - 20'- 30' <br /> A native of southern Asia, this interesting little tree is uncommon in <br /> our area. Its most remarkable trait is its tiny yellow flowers which <br /> appear in July in enormous clusters; as the spent petals accumulate on <br /> the ground below, it appears as if flakes of gold have just rained from <br /> the sky! Although sometimes gawky when young, the twin benefits of <br /> summertime flowers (when few other trees are blooming) and lovely autumn <br /> foliage make this a desirable species to plant, particularly where soils <br /> and electrical lines limit selection. (south side of W 5th, just E of <br /> Adams; 15 -yr -old trees) <br /> Updated September 1992 <br /> 5 <br />