FABACEAE 397 



5. Melilotus [Tourn.] Mill. 



Flowers white. 1. M. alba. 

 Flowers yellow. 



Pod reticulate or alveolate, 2 mm. long. 2. M. indica. 

 Pods glabrous or pubescent, 3-5 mm. long. 



Pods glabrous; leaves closely serrate. 3. M. officinalis. 



Pods pubescent; leaves remotely toothed. 4. M. allissima. 



i. M. alba Desv. In waste places: E. N. Am. Naturalized 

 from Europe. 



Common as a weed nearly throughout our area. 



2. M. indica (L.) All. In waste ground: eastern seaports. 



Naturalized from Asia and Europe. 

 Not very common as a weed. 



3. M. officinalis (L.) Lam. In waste places: E. N. Am. Natur- 



alized from Europe. 



Common throughout our area, but not so common as M. alba. 



4. M. altissima Thuill. In ballast: Atlantic seaports. Adven- 



tive from Europe. 



Rare as a weed near the larger cities. 



M. occidentalis Nutt. has been collected as a waif near New York. 



6. Medicago [Tourn.] L. 



Perennial; flowers violet, conspicuous. 1. M. saliva. 

 Annual, flowers bright yellow, small. 



Pod I seeded, curved, not spiny. 2. M. liipnlina. 

 Pod several seeded, spiny on the edge, spirally twisted. 



Pod loosely coiled. 3. M. denticulata. 



Pod closely coiled. 4. M. arabica. 



i. M. sativa L. In fields and waste places: N. Eng. and Ont. 

 to Minn., Va. and Kan. Introduced from Europe. 



Frequent in fields and waste places in most parts of our area. 



2. M. lupulina L. In waste places and fields: E. N. Am. 



Native of Europe and Asia. 

 Common everywhere as a weed. 



3. M. denticulata Willd. In waste places and in ballast: N. S. 



to Pa. Fugitive from Europe. 



Rare as a more or less fugitive weed near the larger cities. 



4. M. arabica All. In waste places and ballast: N. B. to Pa. 



Adventive from Europe. 



