307] FLORA OF COLUMBIA AND VICINITY 165 



219. LATHYRUS L. Vetchling. 



567. L. myrtifolius Muhl. [Z. palustris myrtifolius 

 (Muhl.) Gray]. Marsh pea. 



Rare in marsh meadows. 



New Brunswick to Manitoba; North Carolina to 

 Tennessee and Missouri. 



220. AMPHICARPA Ell. {^FALCATA GmeL: 

 AMPHICARPAEA DC.]. Hog peanut. 



568. A. monoica Ell. \F. comosa i^) Kunizc: Amphkar- 

 paca monoica (Ell.) Nutt.]. 



Low and rich woodlands; rare. 



New Brunswick to Minnesota and South Dakota; 

 Florida to Louisiana. 



569. A. Pitcheri (T. & G.) Daniels [/?". Pitchen(Y. & G.) 

 Kuntze: Amphicarpaea Pitcheri T. & G.]. 



Common in thickets. 



New York and Michigan to South Dakota; Tennessee 

 and Missouri to Texas. 



221. APIOS Moench. Ground nut. 



570. A. tuberosa Moench. [/i. yi//^5 (L.) MacM.]. 

 Swamp south of Hinkson creek. 



New Brunswick to Minnesota and South Dakota; 

 Florida to Texas. 



222. PHASEOLUS L. ISTROPHOSTYLES 

 Ell.]. Bean. 



571. P. helvolus L. \S.helvola (L.) Britten: 6'. angulosa 

 (Ort.) Ell.]. Wild bean. 



Clay barrens and roadsides; common. 

 Massachusetts and Quebec to Minnesota and South 

 Dakota; Florida to Te.xas. 



572. P. umbellatus (Muhl.) Britton [5. umbellata (Muhl.) 

 Britton: S. peduticularis El!.]. 



Red clay barrens; rare. 



New York to Missouri; Florida to Louisiana. 



