No. 4, February, 1922] UNCLASSIFIED PUBLICATIONS 315 



2047. Wall, A. Helichrysum dimorphum Cockayne — a hybrid? Trans, and Proc, New 

 Zealand Inst. 52: 106-107. 1920. — The writer visited the original localities from which this 

 plant was obtained by Cockayne, and found it associated with Helichrysiwi fdicaule and 

 H. depressum. On the basis of morphological resemblances to the associated species, he 

 would consider it a hybrid between them. In habit, //. dimorphum most resembles H. fdicaule 

 in infloresence, H. depressxim. Extensions of range of the form are given. — Wm. Randolph 

 Taylor. 



2048. WiEGAND, K. M. The genus Echinochloa in North America. Rhodora 23: 49-65. 

 1921. — As the result of an extended investigation, the author publishes a treatment of this 

 genus, for the region north of Panama, differing widely from the recent revision of the genus 

 by Hitchcock (see Bot. Absts. 8, Entry 724). The characters used to define the groups are: 

 Size and form of spikclets, size and nature of spinules, and length of anther. In the latter 

 character, the results of several hundred measurements show a remarkable constancj" of size 

 for each species and variety. A key is given for the following species, varieties, and forms: 

 E. colonum (L.) Link, E. colonum forma zonalis (Guss.) comb, nov., E. zelayensis (HBK.) 

 Schult., E. zelayensis var. macera var. nov., E. zelayensis var. suharistata var. nov., E. 

 frvmentacea (Roxb.) Link, E. crusgalli (L.) Beauv., E. crusgalli forma longiseta (Trin.) Far- 

 well, E.muricata (Michx.) Fernald, E. muricata var. ludoviciana var. nov., E. muricata var., 

 occidentalis var. nov., E. muricata var. microstachya var. nov., E. muricata var. multiflora 

 var. nov., E. echinata (Willd.) Beauv., E. echinata\a,r.decipiensva.r. nov., E. Walteri (Pursh) 

 Nash, E. Walteri forma laevigata forma nov., E. oplismenoides (Fourn.) Hitchcock, E. Holci- 

 formis (HBK.) Chase, E. polystachya (HBK.) Hitchcock, E. guadeloupensis (Hackel) comb, 

 nov., E. paludigena sp. nov., E. paludigena var, soluta var. nov. The description, distri- 

 bution, synonymy, and bibliography of each form is given, as well as many short discussions 

 concerning relationships. — James P. Poole. 



2049. WiLMOTT, A, J. Geranium purpureum T. F. Forster. Jour, Botany 59: 93-101. 

 1921. — This is a discussion of the varieties of Geranium purpureum and G. Rohertianum oc- 

 curring in England. The G. purpureum of Forster is considered to be a variety and is named 

 G. purpureum var. Forsteri. G. Rohertianum var. intermedium is described as new. — Adele 

 Lewis Grant. 



MISCELLANEOUS, UNCLASSIFIED PUBLICATIONS 



Burton E. Livingston, Editor 

 Sam F. Trelease, Assistant Editor 



2050. Anonymous. A new Natal sugar cane cutter. South African Sugar Jour. 5: 713- 

 715. 1 fig. 1921. — An illustrated description and explanation is given of a sugar-cane cutting 

 machine invented by Percy Woodland. — C. Rumbold. 



2051. Anonymous. Endowment of scientific research in the United States. [Rev. of: 

 Anonymous. Funds available in 1920 in the United States of America for the encouragement of 

 scientific research. Nation. Res. Council [U. S. A.] Bull. 9. 1921.] Nature 107: 719-720. 

 1921. — Amount and distribution of funds, with some comment on similar work in Europe, 

 are discussed. — 0. A. Stevens. 



2052. Anonymous. The alternation of generations. Sci. Amer. Monthly 3: 405-408. 

 1921. 



2053. BaJJo, Jos6 de. Ultimos ensayos en la extraccion de la cera de candelilla. [Experi- 

 ments in the extraction of wax from "candelilla."] Rev. Agric. [Mexico] 5: S22-S24. 2 fig. 

 1921. — A method of obtaining a wax of high grade, free of all impurities, is described. The 

 plant used is Pedilanthus pavonius. — John A. Stevenson. 



