380 THE KINDS OF PLANTS 



ee. Leaves pinnately compound (terminal 1- 

 stalked, and the stalk jointed), 3 leaflets. 

 f. Flowers small, in a long raceme. 



g. Pod straight, exceeding calyx: flowers 



small, in very slender racemes 10. Melilotus 



gg. Pods curved or coiled: flowers, small to 



medium, in heads or short spikes 11. Medicago 



ff. Flowers medium to large, clustered at the 

 ends of the raceme. 

 G. Keel of the corolla coiled into a spiral .... 12. Phaseolus 



gg. Keel curved but not coiled 13. Vigna 



dd. The leaves more than 3-foliolate, or digitately 

 compound. 



e. Digitately compound, 5-7 leaflets 14. Lupinus 



ee. Pinnately compound. 



f. Even-pinnately compound: many leaflets: 



flowers yellow 15. Cassia. 



ff. Odd-pinnate (sometimes 3 leaflets) of 5-7 



leaflets: flowers purplish or lavender 16. Apios 



1. WISTERIA. 



Tall shrubby twiner, producing long, dense racemes of showy flowers: 

 leaves pinnate, with several or many leaflets: 2 upper cal^x-teeth shorter: 

 standard large and roundish: pod knotty, several-seeded. 



W. chinensis, DC. Wistaria. Popular climber for porches, from China, 

 with large drooping racemes of bright blue (sometimes white) pea-like 

 flowers in spring and summer. 



2. ROBINIA. Locust. 



Trees or large shrubs with compound, odd-pinnate leaves, with stipules 

 or stipular spines, the base of the leaf-stalk covering the next year's bud: 

 flowers showy, pea-like, hanging in axillary racemes; calyx 5-cleft; standard 

 of the corolla large, turned back, inclosing side petals in bud. 



R. Pseudo-Acacia, Linn. Common black locust. Tree, native West and 

 South, everywhere introduced and valuable for timber. Bark nearly black, 

 very rough: stiff spines at base of each leaf: leaflets 9-19, ovate or oval, 

 somewhat mucronate at tip, on short stalks: racemes 3-5 in. long, from 

 axils, pendulous, slender and loose, the flowers white, very fragrant: pod 

 smooth, 4-7-seeded. 



R. viscosa, Vent. Small tree, native to southern states: cultivated: leaf- 

 stalks, branchlets and pods glandular-viscid (clammy): prickles short: 

 flowers roseate, in dense, erect racemes. April to June. 



R. hispida, Linn. Rose acacia. A straggling shrub, to 10 ft.: branches, 

 stalks, and pods bristly with flexible red spines: flowers pink, handsome, in 

 loose pendulous racemes. Native of southern mountains. Cultivated. May 

 to June. 



