No. 1, May, 1921] ECOLOGY, PLANT GEOGRAPHY 11 



account of the great diversity of its forest conditions, is suggested as the most desirable state 

 in Australia for the school. — C. F. Korstian. 



87. Sun, En Lin. [A siunmer course in cotton-growing at the Nanking Teachers' College.] 

 Hua-Shang-Sha-Chang-Lien-Ho-Hui-Ki-Kau [China Cotton Jour.] 21:218-223. 1920.— The 

 program is outlined of a 6-week course designed to give the student a fundamental knowledge 

 of cultural methods and breeding technique of the cotton crop. A list of the members of the 

 instructing staff and a curriculum are also given. — Chunjen C. Chen. 



CYTOLOGY 



Gilbert M. Smith, Editor 

 George S. Bryan, Assistant Editor 



(See in this issue Entries 221, 254, 273, 292, 328, 330, 333, 342, 442, 605) 



ECOLOGY AND PLANT GEOGRAPHY . 



H. C. CowLES, Editor 

 G. D. Fuller, Assistant Editor 



(See also in this issue Entries 1, 168, 182, 395, 432, 437, 442, 453, 585, 683, 684, 686, 687, 689, 

 692, 695, 696, 701, 702, 703, 708, 719, 720. 727, 728, 730, 732, 735, 739, 744) 



GENERAL, FACTORS, MEASUREMENTS 



88. Bradshaw, R. V. Color variations in flowers. Amer. Bot. 26: 23, 24. 1920.— Addi- 

 tions to the list of flowers with varying color published in American Botanist for Aug. 1919. — 

 W. N. Clute. 



89. Haugh, L. a. Klimaets Indflydelse Paa Udviklingen af Bogens Sommerskud. [Influ- 

 ence of climate on the development of summer growth of beech.] Dansk. Skovforenings Tids- 

 skr. 4: 13-28. Fig. 4- 1919. 



90. Le Plastrier, G. M. Notes on loranths from Wagga district. Australian Nat. 4: 

 139. 1920.— It is observed that the mistletoes of the region grow on hosts having leaves of a 

 form similar to those of the parasite; thus they are hard to detect. — T. C. Frye. 



91. PoRSiLD, A. E. Sur le poids et les dimensions des graines arctiques. [On the weight 

 and dimensions of arctic seeds.] Rev. Gen. Bot. [Paris] 32: 97-120. 1920.— Contrary to the 

 thesis of ScHUEBELER, author finds after many determinations and comparisons that seeds 

 of plants grown in arctic regions (Greenland) are relatively lighter than those of the same or 

 related species grown in alpine or temperate regions. — L. W . Sharp. 



92. Wherry, Edgar T. Soil tests of Ericaceae and other reaction-sensitive families in 

 northern Vermont and New Hampshire. Rhodora 22: 33-49. 1920.— A record of field experi- 

 ments carried out by the author to determine the acidity and the alkalinity of soils in which 

 several species of the Ericaceae and some other plants were growing. The determinations 

 were made by indicators in the field according to a method recently described by the author 

 (Jour. Wash. Acad. Sci. 10: April, 1920). Thestudiesweremadeduring June, 1919, in a variety 

 of mountain, bog, and swamp areas in New Hampshire and Vermont, each of which is 

 described. The general and local soil conditions in each are given, together with lists of 

 plants found. All of the Ericaceae, with one exception {Pyrola asarifolia Michx.), were 

 found in soils giving an acid reaction, although the members of the subfamily Pyroloideae, 

 when compared with members of the other subfamilies, grew more abundantly in soils of 

 rather low specific acidity. The exceptional species, P. asarifolia, was found only in neu- 



