BOTANY OF LA SALLE COUNTY. 63 



the vexillum or banner, the largest; the lower 

 two united by their edges forming a boat-shaped 

 petal or keel carina; and the two side petals or 

 wings spreading; stamens 10, seldom 5, gener- 

 ally 9 united into a tube open on one side, the 

 10th separate; fruit a pod, leaves usually com- 

 pound, entire and with stipules. In sub-order 

 Caesalphiniae the corolla is more nearly regular; 

 in sub-order Mimosoae the corolla is regular. 

 BAPTISIA. P. False Indigo, Branching herbs 

 with flowers 1 in. long in large clusters, pani- 

 cles, or in long, naked spikes; pods inflated. 



B. leucphaed, Hairy, 1 ft. branched; leaves nearly 

 sessile, leaflets narrow-obovate; flowers in large 

 clusters, pale Y. M. Dry pastures. 



B. leucantha. Smooth, tall, bluish green, 2}^ to 5 

 feet, leaves narrow-cuneate; flowers W. on a 

 long leafless stem forming a raceme; Ju. J. Rich 

 damp prairies. 



TRIFOLIUM. Clover. Treefoil. Leaves palmately 

 trifoliate. 



T. partense. P. Red Clover. 



T. reflexum.. A. or P. Leaflets obovate-oblong 

 finely toothed; standard of flowers red, rest 

 whitish; head reflexed in fruit. Borders of 

 woods. R. 



T. repens. P. White Clover. 



T. hybridum. Alsike Clover. Like repens but 

 more erect, not rooting at joints: flowers rose- 

 tinted. Marseilles. Jh. Becoming common. 



T. procumbens. Hop Clover; yellow clover. Creep- 

 ing, slender; leaves small; leaflets wedge- 

 obovate, notched at end; flowers Y. C. B. & Q. 

 tracks N. part of Ottawa, 1882, not seen since. 

 At Marseilles. Rock Island tracks. Jh. 



