Descendenz und Hybriden. — Morphologie und Teratologie. 275 



•COPELAND, E. B., The Variation of some California 

 plants. (Botanical Gazette. XXXVIII. Dec. 1904. p. 401 

 —426. f. 1-9.) 



Data concerning Qiierciis chrysolepls, Q. diimosa, Q. 

 Wislizeni, Q. agrifolia and other oaks, Rhammis callfornlca, 

 Arctostaphylos tomentosa, Baccharis pilularis, Ceanothus sore- 

 diatiis and a number of ferns. Trelease. 



Stefanowska, iVl., Sur la loi de Variation de poids 



du Penicillium glaucum en fonction de Tage. (C. R. 



de l'Acad. des Sc. de Paris. T. CXXXIX. 21 nov. 1904. 



p. 879—881.) 



Le poids de substance seche des cultures diminue brusquement 

 apres la fructification. Paul Vuillemin. 



The ,.Mutationstheorie" of Professor de 



(K ' ^ " '^^' ' 



—640.) 



cati( 



White, C. A., The „Mutationstheor ie" of Professor de 

 Vries. (Report of Smithsonian Inst, for 1901. 1903. p. 631 

 —640.) 



A Statement of the theory with remarks as to its appli- 

 ion to paleontological questions. H. iM. Richards (New-York.) 



'Wieland, G. R., Polar Climate in Time the Major 

 Factor in the Evolution of Plants and Animals. 

 (American Jour. of Sei. 4. Series. Vol. XVI. Dec. 1903. 

 p. 401-430.) 



Concludes that whether the globe was or was not at one 

 time molten, the polar areas were probably the seat of life as 

 it is at present understood. Beginning with the Mesozoic time 

 and extending to the glacial period, overwhelming evidence 

 points to the continued outward dispersion of the great plant 

 and vertebrate groups from the north polar reglon. The varia- 

 bility of the climatic conditions of the northern circumpolar 

 area point to it as the main evolutionary center from which 

 plant and animal life has radiated toward the more stable con- 

 ditions of the tropics. H. M. Richards (New-York). 



Novak, Th., Ueber den Blüthenbau der Adoxa Moscha- 

 tellina L. lOesterr. bot. Zeitschrift. 1904. p. 1 — 7. Tafel 

 I, II.) 



Diese Abhandlung ist ein Auszug aus einer schon 1902 er- 

 schienenen etwas umfangreichen Arbeit in tschechischer Sprache, 

 über welche seinerzeit referirt worden ist.*) Es mag deshalb 

 genügen, darauf hinzuweisen, dass in diesem Auszug aus- 

 schliesslich die auf die Morphologie der Blüthe bezüglichen An- 

 gaben des 1901 verstorbenen Autors wiedergegeben sind, 

 während die auf die Anatomie der Vegetationsorgane bezüg- 



") Botan. Centralblatt. Bd. XC. p. 545. 



18* 



