Band 113. Nr. 25. XXXI. Jahrgang. I. Bd. Nr. 25. 



Botanisches Centralblatt 



Referireüdes Organ 



der 



Association Internationale des Botanistes 

 für das Gesamtgebiet der Botanik. 



Herausgegeben unter der Leitung 

 des Präsidenten: des Vice- Präsidenten . des Secretärs: 



Prof. Dr. Ch. Flahault. Prof. Dr. Th. Durand. Dr. J. P. Lotsy. 



und der Redactions-Commissions- Mitglieder : 

 Prof. Dr. Wm. Trelease, Dr. R. Pampanini, Prof. Dr. F. W. Oliver 



und Prof. Dr. C. Wehmer. 



von zahlreichen Specialredacteuren in den verschiedenen Ländern. 



Dr. J. P. Lotsy, Chefredacteur. 



No. 25, 



Abonnement für das halbe Jahr 14 Mark 



durch alle Buchhandlungen und Postanstalten. 



1910. 



Alle für die Redaction bestimmten Sendungen sind zu richten an: 

 Redaction des Botanischen Centralblattes, Leiden (Holland), Bilder- 

 dijkstraat 15. 



Cook, O. F., Telefon y as inducedreversion. (Science. II. 

 XXX. p. 241—243. 1909.) 



The author suggests an explanation of the cases of so-called 

 telegony in horses, referred to by Darwin and Ewart. The 

 reversion to a striped ancestor may have been induced, "by giving 

 a stronger tendenc}' to expression to a primitive characteristic 

 alreadv included in latent form in the reproductive cells of the 

 female." R. R. Gates. 



Vries, H.de,On triple hybrids. (Bot. Gazette. XLVII. p. 1-8. 1909.) 



When Oenotheria Lamarckiana or one of its mutants is used to 

 pollinate O. biennis or 0. muricata, the F, consists of two types, 

 called 0. laeta and O. velutina. O. lata and O. scintillans, however, 

 which when purely fertilized are inconstant, when crossed with O. 

 biennis give triple hybrids, i. e., in addition to 0. laeta and O. 

 velutina the type of the mother, O. lata or 0. scintillans. 0. strigosa 

 Rydb. and O. Hookeri T. & G., used in place of a race of O. biennis, 

 gave the same result. The laeta and velutina were constant in later 

 generations, but the O. lata (showing some characters of the pollen 

 parent) split in the F 2 , giving lata and velutina. R. R. Gates. 



Cayeux, L., Les Algues calcaires du groupe des Girvanella 

 et la forma tion des oolithes. (C. R. Ac. Sc. Paris. CL. p. 

 359-362. 7 fevrier 1910.1 



L'auteur a reconnu la presence, dans les oolithes ferrugineuses 



Botan. Centralblatt. Band 113. 1910. 41 



