b ▁with ▁an ▁under ground ▁t uber ▁and ▁a ▁single ▁thin ▁leaf ▁ ▁long ▁with ▁the ▁free ▁part ▁ ▁long . ▁Between ▁four ▁and ▁fifteen ▁dark ▁p ink ish - pur ple ▁flowers ▁are ▁arranged ▁along ▁a ▁flow ering ▁stem ▁ ▁long , ▁reaching ▁to ▁a ▁height ▁of ▁. ▁The ▁flowers ▁lean ▁down wards ▁and ▁are ▁about ▁ ▁wide . ▁As ▁with ▁others ▁in ▁the ▁genus , ▁the ▁flowers ▁are ▁invert ed ▁so ▁that ▁the ▁lab ell um ▁is ▁above ▁the ▁column ▁rather ▁than ▁below ▁it . ▁The ▁d ors al ▁se pal ▁is ▁egg - sh aped , ▁about ▁ ▁long ▁and ▁ ▁wide ▁with ▁red ▁stri pes ▁and ▁hair y ▁edges . ▁The ▁later al ▁sep als ▁are ▁linear ▁to ▁lance - sh aped , ▁about ▁ ▁long , ▁ ▁wide , ▁dark ▁p ink ish - pur ple ▁and ▁spread ▁widely ▁apart ▁from ▁each ▁other . ▁ ▁The ▁pet als ▁are ▁lance - sh aped ▁to ▁egg - sh aped , ▁about ▁ ▁long , ▁ ▁wide ▁with ▁dark ▁red ▁stri pes ▁and ▁hair y ▁edges . ▁The ▁lab ell um ▁is ▁narrow ▁egg - sh aped , ▁p ink ish - pur ple , ▁about ▁ ▁long ▁and ▁ ▁wide ▁with ▁tang led , ▁p ink ish - m au ve ▁hair s ▁up ▁to ▁ ▁long ▁on ▁its ▁edges . ▁There ▁is ▁a ▁pale ▁green ▁to ▁cre am - col oured ▁call us ▁with ▁pur pl ish ▁mark ings ▁in ▁the ▁centre ▁of ▁the ▁lab ell um ▁and