92 TREES OF THE NORTHERN UNITED STATES 
ORDER XVIT. LEGUMINOSZE. (PuLsE FamILy.) 
A very large order of plants, mainly herbaceous; found 
in all climates. A few are shrubby, and others are from 
small to large trees. 
Genus 28. LABURNUM. 
Low trees or shrubs with alternate, palmate leaves of 
three leaflets. Flowers conspicuous, pea-blossom-shaped, 
in long hanging racemes, in late spring. Fruit pea-pod- 
shaped, dark brown, and many-seeded; ripe in autumn. 
Labérnum vulgare. (LABURNUM. 
GOLDEN-CHAIN. BEAN-TREFOIL TREE.) 
Leaves petiolate, with 3 ovate-lanceolate 
leaflets, pubescent beneath. Flowers 
bright yellow, nearly 1 in. long, in long 
(1 ft.), pendulous, simple racemes; in late 
spring. Pods 2 in. long, linear, many- 
seeded, covered with closely appressed 
pubescence; one edge thick; ripe in au- 
tumn. A low, very ornamental tree, 10 
to 20 ft. high, often cultivated ; from Swit- 
zerland. Varieties with reddish, purple, 
and white flowers are also in cultivation. 
Var. alpinus has smooth pods. 
Genus 29. CARAGANA. 
Leaves alternate, deciduous, abruptly once-pinnate; 
leaflets mucronate; stipules usually spinescent. Flowers 
pea-flower-shaped, mostly yellow. Trees or shrubs of Asia. 
Caragana arboréscens, Larn. (PEA-TREE. ) 
Leaves with 4 to 6 pairs of oval-oblong, 
mucronate-pointed, hairy leaflets; petioles 
unarmed ; stipules spinescent. Flowers yel- 
low, blooming in May. Pods brown, ripe in 
August. A low, stiff, erect tree, 10 to 15 ft. 
high; in poor soil a bush, From Siberia; fre- 
guent in cultivation C. arboréscens, 
