130 PULSE FAMILY. 



w Pod not completely 2-celled. 



A. distdrtus, Torr. & Gray. Low, diffuse, nearly smooth; leaflets 

 oblong, emarginate ; flowers pale purple ; pod curved, thick-coriaceous. 

 111. to Iowa and S. to Tex. 



* Pod 1-celled, neither suture intrusive, or the ventral more than dorsal. 



A. Codperi, Gray. Gravelly shores N. and W. ; resembles the fore- 

 going, but smoother ; l-2 high, with small white flowers in a short spike, 

 and inflated ovoid pods about 1' long, thin-walled, and not divided inter- 

 nally ; flowers in early summer. 



24. ROBINIA, LOCUST TREE. (For two early French botanists, 

 Bobi n. ) Natives of Atlantic, Middle, and Southern States, planted, 

 and the common Locust running wild N. Flowers late spring and early 

 summer. 



R. Fseudacacia, Linn. COMMON L. or FALSE ACACIA. Tree ; branch- 

 lets naked ; racemes slender and loose-hanging ; flowers fragrant, white ; 

 pods smooth. Used as a stock for next two. 



R. viscdsa, Vent. CLAMMY L. Small tree ; branches and stalks 

 clammy ; prickles very short ; racemes short and dense ; flowers faintly 

 rose-colored ; scentless pods rough, clammy. Very rare wild. 



R. hfspida, Linn. BRISTLY L. or ROSE ACACIA. Ornamental shrub ; 

 branches and stalks bristly ; broad leaflets tipped with a long bristle ; 

 flowers large and showy, bright rose-colored in close or loose racemes ; 

 pods clammy-bristly. 



25. CARAGANA, PEA TREE. (Tartar name.) Planted for ornament. 



* Petioles with unarmed tip. 



C. arborescens, Lam. SIBERIAN P. Shrub or low tree ; leaflets 4-6 

 pairs, oval-oblong, downy; stipules firm or spinescent; flowers 2 or 3 

 together, yellow, in spring ; pod cylindric. Siberia. 



C. microphylla, Lam. Low shrub ; leaflets 6-9 pairs, 4-5 lines long ; 

 stipules thorny ; flowers solitary or in pairs ; pod small, compressed. Asia. 



* * Petioles with spiny tips. 



C. Chamlagu, Lam. CHINESE P. A low or spreading shrub ; has 2 

 rather distant pairs of smooth, oval, or obovate leaflets ; stipules spiny. 

 China and Japan. 



C. frutescens, DC. Low shrub ; leaflets 2 pairs, obovate, crowded at 

 the summit of the petiole ; stipules soft. Siberia to Japan. 



26. COLUTBA, BLADDER SENNA. (Derivation obscure.) 



C. arborescens, Linn. COMMON B. Leaflets 7-11, oval and rather 

 truncate ; racemes of 5-10 yellow flowers, in summer ; pods large, very 

 thin-walled, closed. Eu. 



27. WISTARIA. (For Prof. Wistar of Phila.) Very ornamental 

 woody twiners ; flowers spring. 



W. frutescens. Poir. AMERICAN W. Soft-downy when young ; leaflets 

 9-15, lance-ovate ; raceme of showy blue-purple flowers, dense ; calyx 

 narrowish, wings with one short and one very long appendage at the base 

 of the blade ; ovary smooth. Along streams W. and S , and cult. 



W. Chinensis, DC. CHINESE W. A very fast^growing climber (sometimes 

 20 in a season) ; racemes long, pendant ; wings appendaged on one side 



