Camassia
The wild hyacinths, or quamash, growing at Beth's are forms derived from species in North America, found growing in grassland and prairies. In late spring they produce tall spires of large, star-like flowers, cream or blue-purple. Quite a sight en-masse and can do well grow in a meadow-like planting, or planted in a average soil in a sunny position.
Whether in a flowerbed or a prairie-style planting, the massed spike of starry flowers are extremely attractive to bees, hoverflies and other pollinators and beneficial insects.