94 «. TREES OF THE NORTHERN UNITED STATES 
larly growing, siender tree, 70 to 80 ft. high, with white or greenish- 
yellow, very durable wood, and on old trees very rough bark with 
long, deep furrows. Native; Pennsylvania, west and south, and 
extensively planted and naturalized throughout. A number of va- 
rieties, some of which are thornless, are in cultivation. 
2. Robinia viscosa, Vent. (CLAM- 
my Locust.) Leaflets 11 to 25, ovate- 
oblong, sometimes slightly heart- 
shaped at base, tipped with a short 
bristle. Twigs and leafstalks sticky 
to the touch. Flowers in a short, 
rather compact, upright raceme, rose- 
colored and inodorous. A small tree, 
30 to 40 ft. high; native south, and 
has been quite extensively cultivated 
north. 
3. Robinia hispida, L. (Bristiy 
Locust. Rosk-acaciA), with bristly 
R. viscdsa, leafstalks and branchlets, and large 
rose-colored flowers, is only a bush. Often cultivated. Wild from 
Virginia and south. 
Genus 82, CERCIS. 
Small trees or shrubs, with alternate, simple, heart- 
shaped leaves. Flowers in umbel-like clusters along the 
branches, appearing before the leaves, and shaped like 
pea-blossoms. Fruit pea-like pods, remaining on the tree 
throughout the year. Wood hard, heavy, and beautifully 
blotched or waved with black, green, and yellow, on a 
gray ground. 
1. Cércis Cangdénsis, L. (JuDAS-TREE. REDBUD.) 
Leaves acutely pointed, smooth, dark green, glossy. 1 
Flowers bright red-purple. Pods nearly sessile, 3 to 4 
4 in. long, brown when ripe in August. A small 
ornamental tree, 10 to 30 ft. high, with smooth bark © Canadénsis. 
and hard apple-tree-like wood; wild from Central New York south- 
ward, and often cultivated. 
2. Cércis siliqudstrum (EUROPEAN JUDAS-TREE), from Europe, 
with obtusely pointed, somewhat kidney-shaped leaves, and white to 
purple flowers, is sometimes cultivated. It is not so tall or tree-like 
as the American species. 
