Hobart M. Smith, Hybridization Between Two Species of Garter Snakes
“ The middorsal stripe is not sharp-edged; the lips are barred exactly as in marciana, the postrictal crescent is well defined, and the lateral light stripe extends onto the fourth scale row only very slightly. I refer the specimen to T. radix on the basis of the middorsal light stripe which still is not as irregular as in marciana, upon the nature of the lateral dark spots (not fused) , and upon the slight extension of the lateral light stripe onto the fourth scale row. Yet the specimen is definitely atypical of radix ”
