Crocosmia aurea 'Maculata'
A selected cultivar of Crocosmia aurea, sometimes listed as var maculata.
It differs from the typical form only in the dark marks around the throat.
References:
Goldblatt,P. ,J.Manning and G.Dunlop. Crocosmia and Chasmanthe. Royal Horticultural Society Plant Collector Guide. Timber Press, 2004.