36 Pea Family. 



M. lupulina L. Annual, pubesceDt; leaflets obovate, oval or orbicular; 

 stipules dentate; flowers yellow, small; pod 1-seeded, curved into a partial 

 spire. Reported from Story county. 



HjOSACl^lA Douglas. Ours an annual herb, with 1-3-foliate leaves and 

 rose-colored flowers. Calyx-teeth nearly equal. Petals free from the stamen 

 tube; standard ovate to roundish, claw remote; wings oblong' or obovate; 

 keel incurved. Stamens diadelphous, 9 and 1; anthei-s all alike. 



hj. purshiana Benth. Stem 1-2 feet high, branched, more or less villous- 

 pubescent; leaves sessile or nearly so, leaflets usually 3, ovate to lanceolate; 

 peduncles axillary, 1-flowered; pods linear, about 1 inch long, 4-7-seeded. 

 Dry soil; June-July; infrequent; Henry, Boone, Lyon, and Woodbury 

 counties. 



PSORALEA L. Herbs, with usually glandular-dotted 3-5-foliate leaves, 

 and spiked or panicled flowers. Calyx 5-eleft, campanulate, persistent, the 

 lower lobe the longest. Stamens monodelphous or diadelphous. Pod about 

 the length of the calyx, 1-seeded, indehiscent. 



P. escu!enta Pursh. Prairie Apple. Stem 5-9 inches high, very hairy, 

 from a turnip-shaped farinaceous root; leaves palmately 5-foliate; leaflets 

 entire, oval or obovate, nearly smooth above but hairy below; spike short, 

 dense, long-peduncled; lobes of the calyx and the bracts lanceolate, corolla 

 but little exceeding the calyx, standard ovate, reflexed, wings attached to the 

 middle of the keel; flowers bluish. Prairies; May-June; frequent; Emmet, 

 Lyon, Shelby, Pottawattomie, and Fremont counties. 



P. argophylla Pursh. Stem 1-3 feet high, clothed with silky white hairs; 

 leaves usually 3-foliate; leaflets oval, oblong or obovate; flowers in inter- 

 rupted spikes; calyx and bracts lanceolate. Prairies; common in the western 

 half of the state; June-August. 



P. tenuiflora Pursh. Stem slender, erect, 2-4 feet high, much-branched, 

 appressed pubescent; leaves palmately 3-5-foliate; leaflets linear, oblong or 

 oval; racemes loosely few flowered; Prairies; June-August; frequent; 

 Decatur, Union, and Ringgold counties. 



AMOF^PHA L. Low perennial shrubs, with odd-pinnate glandular-punctate 

 leaves, the leaflets stipellate, midvein exeurrent, and bluish or purplish flow- 

 ers in dense terminal clustered spikes. Calyx 5-toothed. Standard envelop- 

 ing the stamens and style; wings and keel wanting. Stamens 10, exserted, 

 monodelphous at the base. Pod oblong, longer than the calyx, beaked. 



A. fruticosa L. Willow Herb. False Indigo. Shrub 4-7 feet high, somewhat 

 pubescent or glabrate, leaves petioled, 9-19, oval cr oblong, obtuse, not 

 crowded, short-stalked; pod 2-seeded. Common along streams; May-June. 



A. canescens Pursh. Lead Plant. Stems about a foot high, clothed with a 

 white velvety pubescence; leaves sessile; leaflets 21-49, crowded, nearly 

 sessile; pod 1-seeded. Common in dry soil, prairies; June-August. 



A. microphylla Pursh. Stems a foot high or less, nearly glabrous, spike 

 solitary or few in a cluster. Prairies and upland woods; May; Emmet, Cerro 

 Gordo, Palo Alto, Clay, Dickinson, Delaware, Louisa, and Decatur counties. 

 (A. nana Nutt.) 



DALEA L. Herbs, with odd-pinnate glandular-punctate leaves, minute 

 stipules, and small flowers in terminal spikes or heads. Calyx 5-toothed or 

 cleft, teeth about equal. Standard cordate, inserted in the bottom of the 

 calyx; wings and keel adnate to the center of the cleft stamen tube. Stamens 

 or 10. Pod 1-seeded, enclosed in the calyx. 



