130 PULSE FAMILY. 



** ** Pod not completely 2-celled. 



A. dist6rtus, Torr. & Gray. Low, diffuse, nearly smooth ; leaflets 

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

 111. to Iowa and S. to Tex. 



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



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

 going, but smootlier ; l°-2° high, with small white liowei's 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, 

 Robin.) Natives of Atlantic, Middle, and Southern States, planted, 

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

 summer. 



R. Pseudac^cia, 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 ; scentle.ss pods rough, clammy. Very rare wild. 



R. hispida, 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. (Tartarname.) 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., Lain. 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. COLUTEA, 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 VV. 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 



