BOTANY OF LA SALLE COUNTY. 67 



LATHYRUS. P. Everlasting- p ea . 



L. ochroleucus, Wild Pea. Stem slender; leaves 

 of 3 to 4 pairs of ovate or oval light G., entire 

 thin leaflets. Y. W., 1 to 3 ft.; peduncles 7 to 

 16 flowered. 



L. palustris. Marsh Pea, Wild .Sweet Pea. Stem 

 slender, angled, angles more or less winged; 

 leaves of 2 to 4 pairs of narrows-oblong', mucro- 

 nate pointed, entire leaflets; peduncles 3 to 5 

 flowered; flowers bluish P. A beautiful vine 1 

 to 3 ft. Middle Ju. on. 



APIOS. P. ' Ground Nut. Slender vine with milky 

 juice. 



A. tuberosa. Leaves of 5 to 7 ovate, lance- 

 olate leaflets; flower chocolate Br. in short, 

 dense and often branching- racemes. ; Ju. Aug. 

 It spring's from a tuber. 

 PHASEOLUS. P. Bean. 



P. perensis. Wild Bean. Stem long-, slender, 

 twining-. Leaves 3 foliate, leaflets roundish, 

 ovate, short pointed; pods curved, drooping-; 

 flowers small, P. 



P. diversifolius. A. Prostrate, slender, branch- 

 ing-; leaflets ovate 3 lobed or oblong- and entire, 

 flowers G. W. ting-ed with R. Pod straig-ht, 

 brown, opening- with a spring- when ripe. 



P. pauciflorus. A. Many stems from same root, 

 twining-, slender pubescent; leaves oblong to 

 linear; flowers P.: pod 1 in., downy. 

 CERCIS. P. Small trees. 



C. Canadensis. Red Bud. Judas Tree. Bark 

 roug-hish, brown, branches crooked, straggling-, 

 leaves cordate, acuminate, thin, smooth, light 

 green, (when young P. G.) 1^ to 2/4 in. wide, 

 flowers in small clusters, R. P. numerous, ap- 



