68 BOTANY OF LA SALLE COUNTY. 



pearing when the leaves are small and succeeded 

 by thin flat pods 1# in. long; 12 to 25 ft. M. 

 CASSIA. P. Senna. Erect, rig-id, leafy. 



C. Marilandica. Stem, tall, furrowed, leafy; leaves 

 of 6 to 9 pairs of oblong, obtuse, smooth leaflets, 

 flowers in racemes Y. ^ in. long-, pods flat, at 

 first hairy, becoming- smooth. 



C. Chamaecrista. Stem round, smooth; leaves of 

 10 to 15 pairs of narrow, oblong-, oblique, leaf- 

 lets, sensitive folding- when touched; flowers Y. 

 with violet brown eye, 1 in. dia. ; pods 1^ in. 

 long-. 6 to 18 in. J. Aug-. Prairie. 



GYMNOCLADUS. A tree with rough, brownish 



bark. 



G. Canadensis. Coffee Nut. Branches few straig-ht; 

 leaves twice pinnate, large 35x35 in. leaflets 

 ovate; flowers whitish in terminal racemes; pod 

 1^ in. wide 3 to 4 in. long, thick, containing- 3 

 or 4 hard, grayish seeds one-half in. dia. 30 to 

 60 ft., 4 to 15 in. dia. 111. bottoms. 



GLEDITSCHIA. Honey Locust; a large very thorny 



tree. 



G. triacantha. Smooth, dark bark, much branched, 

 and once or twice compound small clusters of 

 small G. Y. flower, followed by long-, somewhat 

 curved, smooth, flat pods 50 to 70 ft. 10 to 30 

 in. dia. Pods 6 to 10 in. Ju. 



DESMANTHUS. P. Herb erect, many stems from 

 one root, grooved. 



D. brachylobus. Leaves twice pinnate, finely 

 divided, folding up if touched; flowers white in 

 close lerminal heads, pods spirallv twisted, 

 2 or 3 ft., J. Aug. Sands and gravel banks 

 along- rivers. 



