Even though GRIN accepts two species names for Pulsatilla (2007-2008), ITIS says that even the genus name is no longer accepted (2011).
http://www.itis.gov/servlet/Si...
The links on these sites just aren't working the right way. That was supposed to take you to all of the Pulsatilla entries, but the link reverted to a general page. Enter Pulsatilla into the search box and you'll see what I mean. Every species name has been recategorized as a species of Anemone. Pulsatilla campanella, once again, is not even named. This often means that it became a synonym so long ago that the information is no longer present on GRIN or ITIS. Tropicos' source for P. campanella is a book published in the Soviet Union in 1931.
Here's the information about Pulsatilla as a genus name:
http://www.itis.gov/servlet/Si...
