I have a number of Camassia leichtlinni growing in containers on the patio. These are the blue form but there is also a white variation. C. leichtlinni hails from the States and grows to about three feet/one metre.
 The lower growing C. quamash was once prolific on the plains and meadows of America. I have read that the bulbs were gathered by Native Americans and roasted in pits to make them edible. As the continent was colonized this harvest was decimated by the spread of European style agriculture.