Leftwood, I don't see anything in your IPNI link that's more recent than the 2011 ITIS information, listing P. miyabeanum as a synonym of P. nudicaule subsp. nudicaule.
http://www.itis.gov/servlet/Si...
The GRIN info, saying it's a synonym of P. nudicaule, is dated 2001. That's why I changed it to bring it into conformity with the ITIS info.
