Bulb blackish. Leaves up to six, 20-50cm long, 5-20mm wide, sometimes greyish above. Flower stem 20-80cm tall with a 5-30cm raceme of pale blue to violet or white flowers each one 2-7cm across. Petals twist or remain separate on fading. Western and central North America. A very variable species with eight subspecies listed. Blue forms are usual in cultivation, such as 'Orion'. The white 'Flore Albo' may still be available.