rapprocher les ovaires à placentas pariétaux de la disposition caractéris- 

 tique des Gymnospermes, ce qui est inadmissible. 



Une série de cinq diagrammes montre clairement la gradation qui relie 

 les types extrêmes; ce sont : i. Pistil dialycarpelle avec prolongement de 

 Vaxe entre les carpelles (Géranium)] 2. Pistil gamocarpelle saus prolon- 

 gement de Taxe (placentatinn axile); 4. Ovaire uniloculaire à placentas 

 fortement saillants; 5. Ovaire uniloculaire à placentas pariétaux. P. V. 



PUBLICATIONS PÉRIODIQUES 



Annals of Botany (Vol. II, n° 6). 



T. Johnson. Arceuthobium Oxycedri. — A. B. Rendle. On the develop- 

 ment of Aleurone-grains in the Lupin. - G. Murray and L. A. Boodle. On 

 the structure of Spongocladia Aresch. \Spongodendron Zanard.) with an 

 account of new forms (S. dichotoma, S. neocaledonica spp. nn.). — C. Reid. 

 Notes on the geological History of the récent Flora of Britain.— M. Hartog. 

 Récent researches on Saprologniea-. — H. Marshall Ward. Illustration of 

 the structure and lile-history of Pitccinia graminis. — S. H. Vines. On the 

 systematic position of Isoetes L. — A. B. Rendle. On the occurence of 

 Starch in the Onion. — S. Schoenland. A modification of Pagan's Growing 

 Slide. 



Botanical Gazette (Vol. XIII, n" g, sept. 1888). 



Selmar Schoenland. The botanical Laboratory at Oxford. — Gh. Ro- 

 bertson. Zygomorphy and its causes. III. — Abstracts of the botanical pa- 

 fiers read before section F. of the A. A. A. S., at the 37 th meeting, Cleve- 

 land, Aug. 15-22, 1S88. N. L. Britton : A plea for uniformity in biologi- 

 cal nomenclature; Thos. Meehan : A study of Hydrangea as to the objects 

 of cross-fertilization; Lewis Sturtevant : A phase of évolution; Jos. 

 Schrenk : Notes on the inflorescence of Callitriche ; Albert N. Prentiss : 

 Hygroscopic movements in the cone-scales of Abietineae; Thos. Meehan : 

 Some new facts in the life- history of Yucca and the Yucca moth; On the 

 cause and significance of dichogamy in flovers ; Adaptation in the honey- 

 suckle and insect visitors; Byron D. Halsted : Pollen germination and pol- 

 len measurement; W. J. Beal : Comparison of the Flora of eastern and 

 western Michigan in the latitude of 44 44' ; Observations on the succes- 

 sion of forests in northern Michigan; D. E. Salmon : Discovery of the pro- 

 duction of immuuity from contagious diseases produccd by chemical sub- 

 stances formed during bacterial multiplication. — A. A. Crozier. Silk see- 

 king pollen. 



