WISFAL  ALFALFA  (Reg.  no.  GP-259,  PI  560333)  Medicagosativa  L.  subsp. falcata  (L.) Arcang. is a syn-2 of Ax WISFAL-1, which was derived  from  20 diploid plant introduction falcatalines  (1,2).  The  conversion  from  diploid  to  tetraploid was  ac-complished  by  backcrossing  tetraploidy into diploids  using  2neggs  (2).  Seven  sexual  generations  were  used  in  the develop-ment  of  WISFAL.  Populations  were  maintained  in  field  nur-series  in southern  Wisconsin  between  generations  since  1973.WISFAL   is  robust  vegetatively,   and  fertile  in  intrastrain  orinterstrain  crosses with cultivated alfalfa,  M.  sativa.  Thus,  thereis  unrestricted  gene  flow  from  WISFAL  to  any  desired  culti-vated  tetraploid  cultivar,  strain,  or  population