Comments on HV’s Über Organbildung im Pflanzenreich: über Wachstumsursachen und Lebenseinheiten [pt 1, 1878].
Mentions paper by his son [Francis Darwin, "The theory of the growth of cuttings, illustrated by observations on the bramble, Rubus fruticosus", J. Linn. Soc. Lond. (Bot.) 18 (1881): 406–19].