I was heavily involved with the Green Party in the mid '90s. At that time, there was an attempt by a small membership organization calling themselves Greens/Green Party USA that tried to gain national party status. Their FEC application asking that they be considered the national committee of a national party was rejected because Ralph Nader was not considered a candidate for the purposes of an FEC opinion and there was not enough federal activity. In my own small way I hope I helped stall the decision until the national party idea could be hashed out by the actual state parties who would be included.
the url is: http://herndon3.sdrdc.com/ao/no/960035.html