136 Trans. Acad. Sci. of St. Louis. 



Psoralea lanceolata, Pursh. Stems erect from large creep- 

 ing rhizomes. Sand-hills. 



Psoralea esculenta, Pursh. A globose woody-fleshy sunken 

 root, well stored with starch, abruptly tapering into a slender 

 tap-root. An elongated crown reaches to the surface and 

 bears buds along the side. Prairie. 



Amorpha canescens, Nutt. Similar to the next. Forms a 

 knotty crown. Prairie. 



Amorpha fruticosa, L. Woody root. No vegetative 

 propagation. Moist places. 



Petalostemon violaceus, Michx. P. candidus, Michx. 

 P. mullifiorus, Nutt. All produce a thick woody root, sup- 

 porting a large crown with numerous stems. First occurs 

 on prairie and stony hills ; the second mostly on prairie ; the 

 third is confined to limestone hills. 



Astragalus caryocarpus, Ker. Crown of nearly upright 

 stems at surface of ground, supported by a strong more or 

 less branched tap-root. Prairie. 



Astragalus Plattensis, Nutt. Slender creeping rhizomes 

 which establish plants at intervals of two to six inches. Each 

 such plant forms a slender tap-root, below the rhizome, while 

 each stem may form a crown at the surface. Prairie. 



Astragalus lotiflorus, Hook. A tap-root forming a crown 

 at summit. Limestone hills. 



Glycyrrhiza lepidota, Nutt. Root-like rhizomes creeping 

 several feet before establishing plants. Each plant produces 

 a crown and also sends out a few rhizomes. Moist prairie. 



Desmodium acuminatum, DC. A slender deep, sunken 

 root at the apex of which arise a stem made up of a series 

 of progressively younger portions toward the surface. 

 Upland woods. 



Desmodium canescens, DC. A strong woody crown. Open 

 woods. 



Desmodium sessilifolium, Torr & Gray. Tap-root with 

 crown. Prairie. 



Lespedeza violacea, Pers. A slender tap-root with crown 

 of numerous slender stems. Upland woods. 



Lespedeza capitata, Michx. Crown upon a strong woody 

 root. Prairie. 



