Abstract
Summary Some data on the leaf nodule symbiosis of Ardisia crispa (Thunb.) A.DC. are given. The nodule containing margins of the leaves contain more nitrogen and less ethanol-soluble sugar than the midrib sections. 14CO2 photosynthesis experiments show a higher activity in the ethanol-soluble as well as in the insoluble fraction of the margin than in those of the midrib section; the activity of the ethanol-soluble sugars was, however, lower in the margin than in the midrib section. The leaves contain a red pigment of anthocyanic nature. Fixation of atmospheric nitrogen by the symbiont could not be detected.
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