DOUBLE NUMBER. 
VOL. XIX, Nos. 1 & 2. 
Jan. & Feb., 1920. 
[Published March 30th, 1920.] 
THE 
NEW PHYTOLOGIST 
A BRITISH BOTANICAL JOURNAL, 
EDITED BY A. G. TANSLEY* M.A. S FiR.S. 
UNIVERSITY LECTURER IN BOTANY, CAMBRIDGE, 
IN CONSULTATION WITH THE STAFF OF THE CAMBRIDGE BOTANY SCHOOL. 
Contents: 
THE EVOLUTION OF PLANTS - » - - A. 
PHYLOGENETIC CONSIDERATIONS ON THE INTER- 
NODAL VASCULAR STRANDS OF EQUISETUM [With 
Seven Figures in the Text] - - * * - Lady 
MUTATIONS AND EVOLUTION. Chapters I and II 
R, Ruggles Gates. 
CAMPY LON EM ALAHORENSE , A NEW MEMBER OF 
SCYTONEMACEiE [With Six Figures in the Text] S. L. Chose , 
THE OCCURRENCE OF ACTINOMYCES-LIKE ENDOTRO- 
PHIC MYCORHIZA [With Five Figures in the Text] Jean Dufrenoy 
ELEMENTARY LECTURING WITH THE HELP OF 
SCHEDULES - - - - - * ~ * 
JAMES WILLIAM HELENUS TRAIL - * - - * 
A . G. T . 
M» S . 
PUBLISHED MONTHLY OR BI-MONTHLY (EXCEPT AUGUST AND 
SEPTEMBER). 
WILLIAM WESLEY & SON, 
28 Essex Street, Strand, W.C.2. 
' < 7 ■ _ 
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Subaorlptlon-Prfce, One Pound per annum (ten numbers) poet free. 
PRICE OF MONTHLY NUMBER - HALF-A-CROWN. 
PRICE OF BI-MONTHLY NUMBER - FIVE SHILLINGS. 
