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A favorite throughout much of temperate North America, this maple's <br /> leaves make a lovely picture when their silvery undersides flutter in <br /> the north breeze that prevails in our community throughout the summer. <br /> Leaves turn yellowish in fall. (east side of Lincoln St, btw 5th and <br /> 6th; 15 -yr -old trees) <br /> SUGAR MAPLE (Acer saccharum), crown spread - 40'+ <br /> Depicted on the Canadian flag and also the source of maple syrup, this <br /> tree is popular for its spectacular autumn tints, which range from <br /> orange to scarlet. It requires well- drained soils. This species <br /> generally does not tolerate hot downtown sites surrounded by concrete <br /> and asphalt, yet grows well in the better shaded, cooler neighborhoods. <br /> (north side of W 19th Ave, btw Jefferson and Madison; 10 -yr -old trees) <br /> NORTHERN CATALPA (Catalpa speciosa), crown spread - 40'+ <br /> This species is most spectacular in June, when it produces showy <br /> clusters of white, orchid -like flowers that provide a holiday for <br /> honeybees (and smell good to humans, too!). The flowers are followed by <br /> long, thin pods which remain on the tree after leaf -drop, adding <br /> interest to the tree's winter silhouette. The catalpa's large, heart - <br /> shaped leaves are a light green all summer, then turn yellow in fall. <br /> (both sides of Monroe St, btw llth and 13th; 40 -yr -old trees, most of <br /> which have suffered repeated decapitation due to their unfortunate <br /> location beneath power lines) <br /> WHITE ASH (Fraxinus americana), crown spread - 30' - 40'+ <br /> The ashes are perhaps best -known for their spectacular autumn tints, and <br /> this species is no exception, with colors ranging from yellow to red and <br /> purple, depending on the cultivar selected. The white ash is adapted to <br /> a variety of soils, and even appears to do well on heavy clay. It <br /> develops a broadly domed, symmetrical canopy and casts a moderate amount <br /> of shade. (east side of Olive St, btw 13th and 14th; 10 -yr -old trees) <br /> TULIP TREE (Liriodendron tulipifera), crown spread - 40'+ <br /> Because it flowers in May, well after leafing out, the tulip tree is <br /> less familiar to most people than its close relatives, the showy <br /> magnolias. Nonetheless, the orange and yellow, tulip -like flowers <br /> produced on older trees are a spectacle to behold. Its curious leaves <br /> are a lustrous green all summer, and often turn a butter yellow in fall. <br /> This species does best on deep, well- drained soils, but appears remark- <br /> ably tolerant of the heavier soils of the clay neighborhoods. (1371 <br /> Washington, two 15 -yr -olds) <br /> PAULOWNIA (Paulownia tomentosa), crown spread - 40'+ <br /> Also known as the princess or empress tree, this showy member of the <br /> snapdragon family grows remarkably fast for its first ten years, <br /> producing new shoots six feet or more in length and bearing heart - <br /> shaped leaves almost a foot across. It is most stunning in April, <br /> though, when its leafless branches bear tall, upright clusters of richly <br /> scented lavender flowers. (888 W 8th, 30 -yr -old tree; SE corner of <br /> Clark and Madison, two newly planted trees) <br /> 2 <br />