Band 131. Nr. 11. XXXVII. Jahrgang. I. Bd. Nr. 11 



Botanisclies Centralblatt. 



Referierendes Organ 



der 



Association Internationale des Botanistes 

 für das Gesamtgebiet der Botanik. 



Herausgegeben unter der Leitung 



des Präsidenten: des Vice -Präsidenten: des Secretnrs: 



Dr. D. H. Scott. Prof. Dr. Wm. Trelease. Dr. J. P. Lotsy. 



und der Redactions-Comrnissions- Mitglieder : 



Prof. Dr. Wm. Trelease, Dr. C. Bonaventura, A. D. Cotton, 



Prof. Dr. C. Wehmer und Dr. C. H. Ostenfeld. 



von zahlreichen Specialredacteuren in den verschiedenen Ländern. 



Dr. J. P. Lotsy, Chefredacteur. 



No. 11. 



Abonnement für das halbe Jahr 15 Mark 

 durch alle Buchhandlungen und Postanstalten. 



1916. 



Alle für die Redaction bestimmten Sendungen sind zu richten an: 

 Rjdaction des Botanischen Centralblattes, Haarlem (Holland), Spaarneiy. 



Ellis, M. M., Seed Production in Yucca glauca. (Bot. Gazette. 

 LVI. p. 72—78. 1913.) 



In the course of other collecting some data were gathered con- 

 cerning the amount of seed produced by Yucca glauca. This plant 

 depends upon the Yucca or Pyo)iuba moth for pollination, and the 

 larvae of the moth in turn feed upon some of the developing seeds 

 of the Yucca. As a result, Yucca produces an excess of seed. It is 

 concerning this excess of seed and the number of seeds eaten that 

 data are submitted. 



In conclusion of the researches it is to be noted that Yucca is 

 a successful plant in regions where the climatic conditions are 

 requisite and the moth is found. The peculiar method of polli- 

 nation by a Single insect species, which is maintained at the expense 

 of the plant, must then also be considered successfuU. The averages 

 show that it is. An average pod produces 300 seeds, over 100 of 

 which are perfect, at a loss of 58 seeds, that is 21 per cent of the 

 total production. Jongmans. 



Bolles Lee, A., La structure des chromosomes et du 

 noyau au repos chez Paris quadrifolia. (La Cellule. XX VIII. 

 p. 265-300. Fl. 1, 2. 1913.) 



L'auteur donne les conclusions suivantes au fin de son article: 



Les chromosomes de la telophase homeot3^pique sont des elements 



Courts, largement alveolises. Les descriptions de Grögoire et 



Wygaerts des telophases du Trillium et de VA/liinn se verifient 



ici trfes exactement. Mais l'alveolisation qu'ils montrent ne se produit 



Botan. Centralblatt. Band 131. 1916. 16 



