114 PAPILIONACEAE 



2. T. medium L. Like the last but leaflets not spotted, and flower 

 heads peduncled. Independence and Courtney. Uncommon. May-Sep- 

 tember. 



3. T. hybridum L. ALSIKE CLOVER. l-2 high, ascending : leaflets 

 obovate, serrate : flowers 3 // -4 // long, peduncled : pedicels l // -2 // long. 

 Frequently adventized in waste places. May-September. 



4. T. repens L. WHITE CLOVER. Widely creeping : leaflets ob- 

 ovate to obcordate, serrate : flowers as in the last. Very abundant in 

 fields, copses, etc. May-September. 



6. LOTUS L. 



Herbs with red dish -yellow flowers. Pods linear, 1-several-seeded. 



1. L. Americanus (Nutt.) Bisch. PRAIRIE TREFOIL. 6 / -2 high, 

 erect, pubescent : leaflets oblong : flowers numerous : peduncles 1-flow- 

 ered, leafy-bracted : pod V long. Adventized along railroads at Shef- 

 field : also abundant along roads west of Lee's Summit. June-August. 



7. PSORALEA L. 



Leaves 3-5-foliolate. Flowers small, bluish, in racemes. Pods ovoid, 

 short, indehiscent, 1-seeded. 



Leaflets three. 



Plants canescent. 1. P. tenuiflora. 



Plants densely silvery-pubescent. 2. P. argophylla. 



Leaflets five. 3. P. esculcnta. 



1. P. tenuiflora Pursh. Bushy, 2-4 high : leaflets oval to oblong : 

 racemes slender, few-many-flowered : pods ovate to ovoid, abruptly 

 beaked. Common in rocky barrens and prairies, especially in the south- 

 western part. May-July. 



2. P. argophylla Pursh. l-2 high : leaflets oval-oblong : flowers 

 4 r/ long, in interrupted spikes. Adventized along the railroad three 

 miles south of Independence. May-July. 



3. P. esculenta Pursh. PRAIRIE TURNIP. 12 / -18 / high, whitish 

 villous-pubescent : leaves digitately 5-foliolate ; leaflets obovate : spikes 

 dense, often 3' long. Adventized along railroad east of Sheffield. June. 



8. AMORPHA L. 



Shrubs with pellucid-dotted pinnate leaves and flowers in close spikes. 

 Corolla reduced to one petal, the standard, which is wrapped around the 

 style and stamens. Stamens monadelphous below. Pod short, 1-2- 

 seeded. 



Leaflets 12 // -24 // long. 1. A. frulicosa. 



Leaflets 3 // -7 // long. 2. A. canescens. 



1. A. fhiticosa L. FALSE INDIGO. 5-15 high, pubescent or gla- 

 brate : leaflets 11-25, oblong-elliptical, short-stalked : spikes 3'-6 x long : 

 flowers violet-purple. Frequent along streams throughout. May- June. 



