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MIMOSACEAE. 
i. ACUAN Medic. Prairie Mimosa. 
i. Acuan illinoensis (Michx.) Kuntze. ( Desmanthus brachylobus Benth.) 
In rich bottom lands from Ind. and S. D. to Fla., Tex. and Colo.—Sterling. 
2. MORONGIA Britton. Sensitive-brier. 
i. Morongia uncinata (Willd.) Britton. ( Schrankia uncinata Willd.) On 
prairies from Ill. and S. D. to Fla. and Tex.—Exact locality not given. 
Family 70. CASSIACEAE Link. Senna Family. 
Leaves simply pinnate ; corolla very irregular; one of the lateral petals (standard) 
and the lowest petal larger than the rest. 1. Chamaecrista. 
Leaves twice pinnate ; corolla regularly zygomorph, the upper petal only differing 
materially from the rest. 2. Hoffmanseggia. 
1. CHAMAECRISTA Moench. 
1. Chamaecrista fasciculata (Michx.) Greene. ( Cassia fasciculata Michx.; 
C. Chamaecrista Walt.; not L.) In prairies from Me. and S. D. to Fla., Tex. 
and Colo.—Denver. 
2. HOFFMANSEGGIA Cav. 
Leaves, flowers and pods with black glandular dots; pods short, 2-2.5 cm. long, 
straight on the back or nearly so. 1. H. Jamesii. 
Dark glandular dots none; pods 3-4 cm. long, strongly arcuate. 
2. H. drepanocarpa. 
1. Hoffmanseggia Jamesii Torr. In dry soil from Colo, to Tex. and Ariz. 
—Alt. 4000-7000 ft.—Rocky Ford; Colorado City; Arkansas River; Wray. 
2. Hoffmanseggia drepanocarpa A. Gray. In dry soil from Colo to Tex. 
and Ariz.—Canon City. 
Family 71. FABACEAE Reichenb. Pea Family. 
Filaments distinct. 
Leaves pinnate. Tribe I. Sophoreae. 
Leaves digitately 3-foliate. Tribe II. Podalyrieae. 
Filaments monadelphous or diadelphous. 
Rachis of the leaves not produced into a tendril or bristle-like appendage, repre¬ 
senting the terminal leaflet. 
Fruit 2-valved or indehiscent, not a loment. 
Foliage not glandular-dotted. 
Anthers of 2 kinds; filaments monadelphous; leaves digitate; calyx 2- 
lipped. Tribe III. Genisteae. 
Anthers all alike ; filaments diadelphous; calyx 5-toothed. 
Leaflets toothed. Tribe IV. Trifolieae. 
Leaflets not toothed. 
Leaves irregularly pinnate; leaflets even in number, 4 or 6; stip¬ 
ules gland-like; flowers umbellate. Tribe V. Loteae. 
Leaves odd-pinnate; stipules not gland-like; flowers racemose or 
capitate. Tribe VI. Galegeae. 
Foliage glandular-dotted. 
Pod prickly. 
Pod not prickly, indehiscent. 
Tribe VII. Glycyrrhizeae. 
Tribe VIII. Psoraleae. 
