Cassia. Often taken from Latin Cassius, Cassia can also be taken from the Camassia plant native to the West Coast of the USA and Canada, also called "Indian Camas." They are wild flowers that grow in moist meadows, with six-petaled purple or white flowers. They are known in Washington state to turn entire fields of wild wood into a lilac or blue-violet blanket as far as the eye can see in springtime. Check out http://www.pinterest.com/meggiemaye/for-love-of-names/ for more name options
Camassia leichtlinii Alba Camassia leichtlinii Alba is a statuesque late-spring flowering bulb with spires of creamy-white flowers which last for ages. One of the most tolerant and long-lived bulbs you can grow.