om es , ▁this ▁can ▁be ▁used ▁to ▁identify ▁hy br ids ▁and ▁classification ▁of ▁group ings . ▁Spec im ens ▁from ▁Ap ul ia ▁were ▁counted ▁in ▁ 1 9 9 6 ▁by ▁M . ▁Col as ante ▁and ▁in ▁ 2 0 0 3 , ▁( from ▁A pr ic ena ▁ ▁and ▁S ann ic andro ▁g arg an ico ), ▁both ▁counted ▁as ▁ 2 n = 4 0 . ▁This ▁defines ▁the ▁special ▁as ▁a ▁t et rap lo id . ▁ ▁It ▁is ▁normally ▁published ▁as ▁ 2 n = 4 0 . ▁ ▁Tax onomy ▁It ▁has ▁the ▁common ▁names ▁of ▁' Two - flow ered ▁I ris ', ▁or ▁' T win ▁flow ered ▁I ris '. ▁ ▁The ▁Latin ▁specific ▁ep ith et ▁b ic ap it ata ▁refers ▁to ▁' bi ' ▁( two ) ▁' cap it ata ' ▁( head s ). ▁Due ▁to ▁the ▁plant ▁has ▁two ▁flowers ▁at ▁the ▁top ▁of ▁its ▁stem . ▁ ▁On ▁ 1 ▁April ▁ 1 9 9 2 , ▁spec im ens ▁were ▁found ▁in ▁the ▁Italian ▁region ▁of ▁Ap ul ia , ▁between ▁the ▁towns ▁of ▁A pr ic ena ▁and ▁S anni andro ▁G arg an ico . ▁These ▁have ▁been ▁used ▁as ▁a ▁hol ot ype ▁( single ▁physical ▁example ▁( or ▁illustr ation ) ▁of ▁an ▁organ ism , ▁known ▁to ▁have ▁been ▁used ▁when ▁the ▁species ▁( or ▁lower - rank ed ▁tax on )) ▁of ▁I ris