54. Leguminosae 129 



39. Stems erect: leaflets 7-11, oblanccolate; flowers 

 blue (or pink or white), in terminal racemes 



1 0. Lupinus 



37. Leaflets 11-31. 



40. Plants hoary-pubescent; flowers in terminal racemes 



20. Tephrosia 



40. Plants strigose to glabrous; flowers in axillary racemes 

 or headlike umbels. 

 41. Flowers racemose; pods not 4-angled or -jointed. 



42. Leaves even-pinnate 24. Sesbnnia 



42. Leaves odd-pinnate 23. Astragalus 



41. Flowers umbellate; pods linear, 4-angled, jointed 



26. Coronilla 



1. Desmanthus \\ illd. — Illinois Mimosa 



D. illinoensis (Michx.) MacM. River banks or along railroads, 

 local; July-Aug. [Acuan illinoensis (Michx.) Ktze.] 



2. Schrankia VVilld. — Sensitive-brier 

 {Leptoglottis DC; Morongia Britt.) 



S. U7icinata Willd. T)ry sandy soil, rare; Peoria, Aug. 1901, and 

 June \9Q?>, McDonald. [L. nuttallii DC.; M. uncinata (Willd.) Britt.; 

 S. nuttallii (DC.) Standi.]. 



3. Cercis L. — Redbud 



C. canadensis L. Woods, common throughout 111., except the 

 northern counties. Apr. -May. 



4. Gymnocladus Lam. — Kentucky Coffee-tree 

 G. dioicus (L.) K.Koch. Woods, common throughout 111. May- 

 June. 



5. Gleditsia L. 



1. Pods 10-50 cm long, many-seeded, indehiscent; spines stout, often 

 compound, rarely absent; woods, common throughout 111. 

 May-June. Honey Locust. The spineless form is /. inermis (L.) 

 Zabel G. triacanthos L. 



1. Pods obliquely oval, 2-4 cm long, 1-seeded, at length dehiscent; 

 spines slender, mostly simple; borders of swamps, s. and w. 111., 

 not common. Water Locust G. aquatica Marsh. 



6. Cassia L. 



{Chaniaecrista Moench ; Ditremexa Raf.) 



1. Leaflets 2-6 cm long, 1-3 cm wide; corolla regular, the petals near- 

 ly equal; leaves not sensitix'c to the touch: stipules deciduous; 

 calyx-lobes obtuse; stamens 10, the upper 3 imperfect. 

 2. Leaflets 8-20; petiole with a gland near the base; pods 6-13 

 cm long, 5-10 mm wide. 



