The rat snakes in Aiken County, SC are considered to be 3-way intergrades between obsoleta, spiloides, and quadrivittata. There aren't any pure spiloides in SC.

The recognized range of the Yellow Rat Snake goes all the way up to the Pamlico River in NC, sort of like as shown in this range map:

http://www.dlia.org/atbi/species/Animalia/Chordata/Reptilia/Squamata/images/Colubridae/Elaphe_obsoleta/Elaphe_obsoleta_map.jpg

As far as the name "greenish rat", I don't think it has ever been officially described.

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• Intergrade information request - Kevin Saunders, Fri Nov 5 15:32:28 2010
• RE: Intergrade information request - DMong, Sat Nov 6 10:10:20 2010
• RE: Intergrade information request - monklet, Sat Nov 6 10:41:01 2010
• RE: Intergrade information request - DMong, Sat Nov 6 16:28:26 2010
• RE: Intergrade information request - monklet, Sun Nov 7 10:14:12 2010
• RE: Intergrade information request - DMong, Sun Nov 7 13:09:23 2010
• RE: Intergrade information request - monklet, Sun Nov 7 14:05:01 2010
• RE: Intergrade information request - DMong, Sun Nov 7 14:52:00 2010
• RE: Intergrade information request - cochran, Sat Nov 6 16:59:25 2010
• RE: Intergrade information request - DMong, Sat Nov 6 20:59:32 2010
• oh!, and BTW..... - DMong, Sat Nov 6 21:03:12 2010
• RE: oh!, and BTW..... - cochran, Sun Nov 7 14:11:52 2010
• good idea! - DMong, Sun Nov 7 14:51:02 2010
• RE: good idea! - cochran, Sun Nov 7 16:48:01 2010
• RE: good idea! - DMong, Sun Nov 7 19:49:39 2010
• RE: Intergrade information request - foxturtle, Sat Nov 6 18:17:32 2010
• RE: Intergrade information request - rick d, Sat Nov 6 19:50:58 2010
• RE: Intergrade information request - Godfrey, Mon Nov 8 14:41:19 2010
• RE: Intergrade information request - foxturtle, Tue Nov 9 12:17:26 2010
• RE: Intergrade information request - DMong, Tue Nov 9 13:22:41 2010
• RE: Intergrade information request - Godfrey, Tue Nov 9 13:53:59 2010
• RE: Intergrade information request - foxturtle, Tue Nov 9 23:08:16 2010
• North Carolina... - westernNC, Tue Nov 9 17:27:37 2010
• RE: North Carolina... - Godfrey, Tue Nov 9 20:03:57 2010
• RE: North Carolina... - Kevin Saunders, Tue Nov 9 22:08:02 2010
• RE: North Carolina... - foxturtle, Tue Nov 9 23:56:48 2010
• RE: North Carolina... - Godfrey, Sat Nov 13 11:49:26 2010
• RE: Intergrade information request - Elaphefan, Thu Nov 18 16:04:05 2010