PLUM FAMILY 129 



Peduncles slender; pedicels glabrous, longer than the fruit, persistent: leaves 

 rather tliin. 11. P. demissa. 



Leaves glabrous on both sides. 12. P. mclanocarpa. 



2. EMPLECTOCLADUS Torr. Wild Almonds. l. E. fascicuhitus. 



Family 63. MIMOSACEAE. Mimosa Family. 



Legumes flat; valves not separating from the continuous margins. 1. Acuan. 



Legumes 4-angled; valves separating from the continuous margins. 2. Morongia. 



1. ACUAN Medic. Prairie Mimosa. i. .4. ilUnoensis. 



2. MORONGIA Biitton. Sensitive Brier. i. ^^. uncinata. 



Family 6i. CAESALPINIACEAE. Senna Family. 



Leaves bipinnate; anthers opening lengthwise. 1. Hoffmanseggi.v. 



Leaves simply pinnate; anthers opening by terminal pores. 2. Chamaecrista. 



1. HOFFMANSEGGIA Cav. 



Leaves, flowers, and pods with black glandular dots; pod short, straight on the back or 

 nearly so. I. H. Jamesii. 



Leaves, flowers, and pods without glandular dots. 



Pod about 7 mm, wide, strongly arcuate. 2. H. depranocarpa. 



Pod 12-14 mm. wide, str;ught or nearly so. 3. H. repens. 



2. CHAMAECRISTA Moench. Partridge Pea, Sensitive 



Pea, Wild Sensitive Plant. l. C. fasciculata. 



Family 65. FABACEAE. Pea Family. 



Filaments distinct. 



Leaves pinnate. Tribe I. Sophoreae. 



Leaves digitately 3-foliolate. Tribe II. PoD.\LYRrEAE. 



Filaments monadelphous or diadelphous. 



Racliis of the leaves not produced into a tendril or bristle-like appendage, represent- 

 ing the terminal leaflet. 

 Fruit 2-valved or indehiscent, not a loment. 

 Foliage not glandular-dotted. 



Anthers of 2 kinds; fllaments monadelphous: leaves digitate; calyx 2- 



lipped. Tribe III. Ge.visteae. 



Anthers all aUke; fllaments diadelphous; calyx .5-toothed. 



Leaflets toothed. Tribe IV. Trifolie.ve. 



Leaflets not toothed. 



Filaments all or at least 5 of them (alternately) dilated above; 



flowers umbellate, or solitary. Tribe V. Loteae. 



Filaments all flliform; flowers racemose or capitate. 



Herbs, shrubs, or trees; keel of the corolla neither curved nor 



coiled. Tribe VII. Galegeae. 



Herbaceous vines; keel of the corolla in ours coiled or at least 

 curved. Tribe XI. Phaseoleae. 



Filaments all filiform; leaves odd-pinnate; flowers racemose or 

 capitate. Tribe VII. Galege.ae. 



Foliage glandular-dotted. 



Pod prickly. Tribe VIII. Glycyrrhizeae. 



Pod not prickly. Tribe VI. Psoraleae. 



Fruit a loment, i. c, breaking up transversely into 1-seeded indeliiscent reticulate 

 internodes. Tribe IX. Hedysareae. 



Rachis of the leaves produced into a tendril or bristle-like appendage. 



Tribe X. Vicieae. 

 Tribe I. SOPHOREAE. 

 One genus. 1. Sophora. 



Tribe II. PODALYRIEAE. 

 One genus. 2. Thermopsi3. 



Tribe III. GENISTEAE. 

 One genus. 3. Lupinxjs. 



Tribe IV. TRIFOLIEAE. 

 Leaves digitate, in most 3-foliolate. 4. Trifolium. 



I^eaves pinnately 3-foliolate. 



Pod curved or coiled. 5. Medicago. 



Pod straight. 6. Melilotus. 



Tribe V. LOTEAE. 

 Keel prolonged into an incurved beak: leaves odd-pinnate. 



Stipules foliaceous; flowers in umbels. 7. LOTUS. 



Stiptiles gland-like; flowers mostly solitary. 8. Acmispon. 



