NOTICE TO SUBSCRIBERS. 
Subscriptions for 1923 (22s. 6d. post-free) should he sent to Messrs. Taylor 
and Francis, Red Lion Court, Fleet Street, E.C. 4, without delay. 
No. 721 
JANUARY, 1923 
Vol. LXI 
T H E 
JOURNAL OF BOTANY 
BRITISH AND FOREIGN 
J 
EDITED BY 
JAMES BRITTEN, K. C. S. G., F.L.S. 
LATE SENIOR ASSISTANT, DEPARTMENT OF BOTANY, BRITISH MUSEUM. 
CO N T 
PAGE 
Potamogeton in the English Lakes. 
By W. H. Pearsall and W. H. 
Pearsall, D.Sc., F.L.S. 1 
The Type-Species of Pteris. By Wil¬ 
liam R. Maxon. 7 
Dr. Stirton’s New British Mosses 
Revised. By H. N. Dixon, M.A., 
F.L.S. 10 
Notes on Theacese. By T. A. Sprague, 
B.Sc., F.L.S. 17 
Notes on Carnarvonshire Plants. By 
H. W. Pugsley, B.A v F.L.S. ... 19 
Isaac Bayley Balfour (1853-1922.) 
An Appreciation by F. O. Bower, 
Sc.D., F.R.S. .. 23 
ENTS 
PAGE 
Short Notes :— Comma between 
Name and Authority—Types of 
Linnean Species — Rinorea and 
Riana : a Correction . 26 
Reviews :— 
Flora of South Australia. Part I. 
Cyatheacese-Orchidaceee. By J. 
M. Black (Orchidacese by Dr. 
R. S. Rogers) . 27 
Manual of the Trees of North 
America (exclusive of Mexico). 
By Charles Sprague Sargent. 28 
Elements of Plant Biology. By A. 
G. Tansley, M.A., F.R.S. 29 
Book-Notes, News, etc.. 30 
LONDON 
TAYLOR AND FRANCIS, RED LION COURT, FLEET STREET 
DULAU & CO., Ltd., 
34-36 MARGARET STREET, CAVENDISH SQUARE, W. 1. 
Price Tico Shillings net 
