Harder, L.D.; Cruzan, M.B. 1990. An evaluation of the physiological and evolutionary influences of inflorescence size and flower depth on nectar production. Functional Ecology. 4(4): 559-572.
Harder, L.D.; Cruzan, M.B. 1990. An evaluation of the physiological and evolutionary influences of inflorescence size and flower depth on nectar production. Functional Ecology. 4(4): 559-572.