SummaryThe growth of potato plants (Solanum tuber08um L.) was studied over a period of 13 days. The dry weights of the principal organs, leaf areas, and soluble sugar contents of selected leaves were determined on four occasions.Removal of tubers 21 days after the commencement of tuber initiation reduced the absolute growth rates aud net assimilation rates of the plants.It is suggested that the assimilation of plants under high light intensities may be restricted by their ability to utilize or store products of photosynthesis.

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An experiment is described in which a large collection of Stylosanthes introductions, comprising 14 named species, was grown as spaced plants and simple morphological and agronomic data recorded. After applying various methods of numerical analysis, and integrating the results, it was found that species and forms could be delineated. The importance of non-stable agronomic characteristics in the classification of the introductions is explored and the taxonomic status of the resultant groups briefly examined; the use of these systems for plant assessment programmes is discussed.

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