Cytologie und Befruchtung. — Descendenz und Hybriden. 6(1 



auf den reducirenden Eigenschaften des Protoplasmas, da nach 

 Zusatz von Ha O-.- violette Färbung eintritt. 



Freund (Halle a./S.). 



Zei^ERBAUER, E., Kleistogamie von Viola arvensis und ihre 

 Ursachen. (Oester. bot. Zschr. Jg. LIV. 1004. p. 385 



—387.) 



Verf. beobachtete, dass Viola arvensis am Rande von Ge- 

 treidefeldern normale Blüthen, unter dichtstehendem Getreide 

 aber solche mit sehr stark reducierten Fetalen ausbildet, 

 glaubt, dass in diesen die Befruchtung ohne vorhergegangene 

 Oeffnung der verkümmerten Korolle stattgefunden hat und hält 

 Mangel an Licht für die Ursache dieser von ihm als Kleisto- 

 gamie gedeuteten Erscheinung. F. Vlerhapper. 



Proceedings of the American Breeders' Association. 

 (Volume I. Washington. 8^ 1905. 243 pp. 7 pl.) 



An account of the proceedings at the first meeting, held 

 at St. Louis, Missouri, December 29 and 30, 1903, and 

 the second meeting, held at Ch amp a ign , Illinois, February 

 1—3, 1905. 



In addition to administrative and animal-breeding matter, 

 this volume contains the following papers of botanical interest: 

 — de Vries, H., Investigations into the heredity of sporting 

 varieties (pages 20 — 23); Schofield C. S., Descriptive forms 

 and score cards as helps to breeders (24 — 29); Funk, D., 

 Commercial corn breeding (29 — 33); Hartley, C. P., Corn- 

 breeding work in the United States (33 — 37); Webber, H. J., 

 Coiton breeding pages 37—44, plate 1), Roberts, H. F., 

 Breeding soy beans (44— 50); Emerson, R. A., Bean breeding 

 (,50-55); Hopkins, C. G., Experiments in corn breeding 

 (bo — 68); Orton, W, A., Plant breeding as a factor in Con- 

 trolling plant diseases (69 — 72j ; S a u n d e r s , C. E., Some obser- 

 vations on heredity in wheat (77-78); Webber, H. J., Notes 

 on citrus hybrids (78—86, plates 2, 3); Spillman, W. J., 

 Theoretical studies in breeding (87 — 88); Fairchild, D. G., 

 Plant and animal introduction (92 — 100); Beatty, F. E., Im- 

 proving strawberries by selection (107 — 108); Hartley, C. P., 

 Plant breeding principles applied to corn improvement (108 

 — 112, plates 4 — 7); Hays, W. M., The breeding of a hardy 

 alfalfa (112 — 114); Shamel, A. D., The improvement of cigar- 

 wrapper tobacco '115—120); Bolley, L. H., Breeding for 

 resistance or immunity to disease (131 — 135); Bennett, R. L,, 

 Breeding cotton for earliness and productiveness (135 — 137); 

 Saunders, C. E., A natural hybrid in wheat (137-138); 

 Webber, H. J., Explanation of Mendel's law of hybrids 

 n 38— 143); Munson, T. V., Breeding grapes (144—147); 

 Hopkins, C. G., Inbreeding of corn, and methods of pre- 

 vention (147—150); Burbank, L., Heredity (158—161); 



3Q* 



