Botanical abstracts, 6(2):93 (November, 1920)

Dufour, L. [Rev. of: Daniel, L. Les symbiomorphoses; nouvelles recherches sur l'hybridation asexuelle. (The symbiomorphoses; recent investigations on asexual hybridization.) Revue bretonne de Botanique pure et appliquée, 1917.] Rev. Gén. Bot. [Paris] 30: 367-368. 1918.—The term “symbiomorphosis” is applied to the diverse modifications of plants verified as the result of grafting. Two cases are distinguished according as the grafts are between different species or upon hybrids.—(1) Grafts between different species of cacti, vines and conifers are mentioned with the peculiar modifications produced. The cabbage when grafted on the tomato exhibited two tomato characters viz., an internal medullary liver and extremely thin crystals of calcium oxalate in the cells. (2) Under symbiomorphoses among hybrids three kinds of effects are described in specific instances viz., returning to the parental types (pears, vines); attenuation or reinforcement of characters (vines); occasional reappearance of ancestral characters (vines). Author's conclusion: "in the same graft one may encounter variations of diverse origin which are blended together or which encroach upon one another. In general, symbiomorphoses are almost always a resultant complex (globale) of numerous physical, chemical and physiological factors."—E. B. Babcock.