428 SECTIONAL TRANSACTIONS.— K. 



function of systematics in relation to such plants. Finally, we must consider 

 how the new methods of plant breeding, genetical studies and cytology will 

 affect our conception of a natural system of classification, and the deter- 

 mination of phylogenetic relationships. 



Dr. J. W. Gregor. 

 General Discussion on Genetics and taxonomy (12.0). 



Miss M. L. Green. — The evolution and recent progress of botatiical 

 nomenclature (12.30). 



Origin of names. Nomenclature of Ancient Greeks. Nomenclature in 

 the Middle Ages and sixteenth century herbals. Generic names composed 

 of two or more separate words. Specific phrase-names. Nomenclature 

 adopted by Linnaeus before and after 1753 {Species Plantarum, ed. i). 

 Post-Linnaean developments. A. P. de Candolle's general survey of plant 

 nomenclature and suggested rules (1813). Report on zoological nomen- 

 clature presented to the British Association in 1842. First distinction 

 between Rules and Recommendations. Recognition of botanical nomen- 

 clature as independent of zoological nomenclature (1844). Paris Congress 

 (1867) and Lois de la Nomenclature. ' Lois ' not universally accepted. 

 Rule of priority and the effect of its strict observance. Sweeping changes 

 made by Otto Kuntze. Vienna Congress (1905) and ttomina conservanda. 

 Disagreement among botanists concerning the Rules. American Code of 

 Botanical Nomenclature. Suggestions in 1923 for a world code of plant 

 nomenclature discussed at Ithaca (1926). World-wide agreement at 

 Cambridge Congress (1930). Constructive amendments at Amsterdam 

 Congress (1935). Work of International Committees. The type method. 

 Closer co-operation needed between horticulturists, geneticists and taxono- 

 mists in regard to nomenclature of hybrids. 



Afternoon. 



Dr. G. Bond. — Uptake of fixed nitrogen from Leguminous root nodules by 

 the host and by other plants (2.15). 



Experiments are described which aimed at the detection of excretion of 

 nitrogenous substances from the root nodules of the following leguminous 

 types : Soy Bean, Broad Bean {Vicia Faba L.), Forage Lupin {Lupinus sp.) 

 and Pea (Pisum sativum L.). The plants were grown in sand cultures, 

 initially sterile, the nitrogen content of the sand being subsequently 

 determined by the Kjeldahl process. With the first three types the increase 

 in nitrogen content of the sand was negligible, and only slight with the Pea. 

 These results were confirmed by other experiments in which non-legumes 

 were grown in the same pots as nodulated legumes, no benefit being derived 

 by the former. It is concluded that excretion is not a regular accompani- 

 ment of fixation in root nodules. The importance of the structure of the 

 peripheral nodule tissues is stressed. 



Dr. S. Williams. — The morphology of the rhizophoric parts of living 

 Lycopods (2.35). 



The rooting systems of most of the living Lycopods are anomalous and 

 this is particularly so in the Ligulatae. The genus Selaginella shows two 

 distinct types, viz., that of S. spintdosa with its basal knot and that of the 



