No. 2, September, 1920] CYTOLOGY 169 



BOTANICAL EDUCATION 



C. Stuart Gager, Editor 

 Alfred Gundersen, Assistant Editor 



1260. Brown, Nelson Courtlandt. The royal Italian forestry college. Jour. Forestry 

 17: 807-812. 1919.— See Bot. Absts. 5, Entry 1303. 



1261. Clute, WillardN. Plant names and their meanings. — II. Ranunculaceae. Amer. 

 Bot. 26: 2-10. 1920. — The common names used for species of Ranunculaceae traced to their 

 sources when possible. — W. N. Clute. 



1262. Conard, H. S. The general classification of higher plants. Proc. Iowa Acad. Sci. 

 25:237-240. 1920. 



1263. Pammel, L. A. State parks in Iowa. Sci. Monthly 10: 516-521. 1920.— The plan 

 proposes the preservation of some of the forests for the pleasure and education of all the 

 people. — The parks are of different kinds. Lake parks which include enough of all lake shores 

 to conserve animal and plant life; along streams where these have cut through ridges as the 

 Devil's Backbone, and the forests associated with these; ledges on which most of the ferns 

 of the state are found; mounds, palisades and similar areas suggest the plans. — It is far- 

 sighted wisdom on the part of the state to establish these parks to preserve to future 

 generations the natural history and geology and historic features of Iowa. — L. Pace. 



1264. S., E.J. [Rev. of : Church, A. H. Elementary notes on structural botany. Oxford 

 Botanical Memoirs No. 4. 27 p. Oxford University Press, 1919.] Jour. Botany 58:27. 1920. 



CYTOLOGY 



Gilbert M. Smith, Editor 

 George S. Bryan, Assistant Editor 



1265. Balls, W. Lawrence. The existence of daily growth-rings in the cell wall of cotton 

 hairs. Proc. Roy. Soc. London B 90: 542-555. PI. 14-16. 1919.— Cellulose wall of Egyptian 

 cotton swelled to five or ten times normal size by treatment with NaOH and CS2 showed con- 

 centric layering. Correlated with Egyptian field crop conditions where growth is arrested 

 each afternoon. Only one thin primary layer formed while cell is growing in length. When 

 thickening sets in it proceeds to a maximum of 25 layers. — Paul B. Sears. 



1266. Beer, Rudolph, and Agnes Arber. On the occurrence of multinucleate cells in 

 vegetative tissues. Proc. Roy. Soc. London B 91 : 1-17. PI. 1 . 1919. — Lists species in which 

 multinucleate cells have been recorded in vegetative tissues, together with region of plant 

 involved. List includes 177 species in 60 families of vascular plants. Theory of previous 

 workers regarding amitotic origin of such multinucleate phases is questioned. No clear ex- 

 ample of amitosis observed but numerous cases of mitosis normal up to cell plate stage ob- 

 served. Instead of normal cell walls formation after mitosis Kinoplasm forms a hollow 

 sphere around nucleus — "phragmosphere.'' This gradually enlarges until coextensive with 

 cell cytoplasm. Suggested that numerous nuclei render available for use of cytoplasm valu- 

 able material (a) by increased nucleus surface (b) in certain cases by nuclear disintegration 

 and resorption. — Paul B. Scars. 



1267. Buscalioni, L. Nuove osservazione sulle cellule artificiali. [Further observations 

 on artificial cells.] Malpighia 28: 403^434. PI. 11-12. 1919.— This is a description and dis- 

 cussion of experiments with colloidal films. The plates are from photomicrographs of the 

 results of experiments and show not only simulation of cell-walls, but also simulation of 

 nuclei with chromatin-reticulum. — L. W. Riddle. 



