82 GENETICS [Bot. Absts., Vol. IV, 



537. Chamberlai.v, C. J. Chondriosomes in plants. [Rev. of : Mottier, D. M. Chon- 

 driosomes and the primordia of chloroplasts and leucoplasts. Ann. Botany 32: 191-214. 1 pi. 

 1918.] Bot, Gaz. 67:270-271. Mar., 1919.— See Bot. Absts. 4, Entry 169. 



538. Chamberlain, C. J. Cytology of gigantism. [Rev. of: Tischler, G. Untersuch- 

 ungen iiber den Riesenwuchs von Phragmites communis var. pseudo-donax. (Investigations 

 of the gigantic growth of Phragmites communis var. pseudodonax.) Ber. Deutsch. Bot. Ges. 

 36: 549-558. 1918.] Bot, Gaz. 69: 192. Feb., 1920.— See also Bot. Absts. 3, Entry 1040. 



539. Chittenden, Fred J. Seedling potatoes. Gard. Chron. 66:264. Nov. 22, 1919.— 

 Gives examples of seedling potatoes which, as far as could be determined by visible char- 

 acters, were identical to varieties previously introduced. Raises question whether such 

 phenotypically similar plants may not differ in other characters such as greater cropping 

 power. — Fred A. Krantz. 



540. Chopard, L. Note sur un individu hermaphrodite de Clonopsis Gallica Charp. 

 (Orth. Phasmidae). [Note on a hermaphrodite specimen of Clonopsis gallica.] Bull. Soc. 

 Zool. France, 43: 168-175, 4 fig- 1919. — Author describes a specimen of phasmid, Clonopsis 

 gallica, Charp. which exhibited both male and female characteristics, in part blended together, 

 and in part separated asymmetrically. He discusses proposed explanations for the occasional 

 occurrences of males and hermaphrodites in species which normally produce only partheno- 

 genetic females. He inclines toward the view that unfavorable conditions are the cause. — 

 Sewall Wright. 



541. Clair, H. W. Scottish chamomiles. Chem. and Druggist 91: 1512. 1919. 



542. Clements, E. Variation and mutation in Epilobium. Carnegie Inst. Washington 

 Year Book 17:293. 1918. — No results yet presented, but statement that "the production 

 of flower mutation by manipulating the flow of food to different parts through pruning, muti- 

 lation, change of position, correlation, etc., has proved unusually successful." — Merle C. 

 Coulter. 



543. Clouston, D. The selection of rice on the Raipur Experimental Farm. Agric. and 

 Co-op. Gaz. [India] 15 7 :5-9. 1919. — The author describes the method of improvement of 

 available varieties of rice {Oryza sativa) by mass selection, and the testing of promising varie- 

 ties in plots. Rice cultivated in the Central Provinces, India, falls into three classes: early, 

 maturing in 3 to 4 months and suitable for upland soils; medium, maturing in 4 to 5 months; 

 and late, maturing in 5 to 6 months, suitable for irrigated land only. Late varieties give the 

 largest yield. — Winfield Dudgeon. 



544. Coates, Leonard. Improvement of fruit trees. California Citrograph 3: 52. 1 fig. 

 Jan., 1918. — Tree-fruit breeding; popular; describes a bud mutant in the French prune. — 

 Howard B. Frost. 



545. Cockerell, T. D. A. Some western columbines. Torreya 19:137-141. July, 

 1919. — A discussion of observations upon Aquilegia desertorum, A. elegantula, A. • lha, 

 and their crosses which indicate 1 ha1 Aquih gia is an unusually favorable genus for the inves- 

 tigation of genetic problems. Some of its advantages are the following: (1) The ready hy- 

 bridization and the fertility of the Fi. (2) Tendency to mutate, apart from crossing. (3) 

 The existence of spurred and spurless forms, and of forms with and without colored plastids 

 and anthocyanin colors. (4) The heterozygotes can be easily preserved and propagated In- 

 dividing the crowns. (5) Incidentally, beautiful and interesting garden plants are produced. 

 — F. O. Gro 



546. Cole, Leon J. A defect of hair and teeth in cattle — probably hereditary. Jour. 

 Heredity 10:303-306. Fig. 6-10. Oct., 1919.— A note on the occurrence of defective teeth 

 and hair in a herd of pure-bred 11 .1 -■ -Fri lian cattle. A pure-bred sire having defective 



