daylily

(Bot.) (a) any plant of a genus of plants (Hemerocallis) closely resembling true lilies, but having tuberous rootstocks instead of bulbs. The common species have long narrow leaves and either yellow or tawny-orange flowers, which often bloom for only one day. (b) A genus of plants (Funkia) differing from the last in having ovate veiny leaves, and large white or blue flowers. [ 1913 Webster +PJC ]