594 Anatomie. — Biologie. — Morphologie etc. 



entiers, lobes ou divises. A la germination, les premieres feuilles 

 sont souvent plus simples que les cotyledons. 



Ces divers caracteres definis permettent de classer les divers 

 genres de cette famille d'apres les affinites anatomiques, ou mieux 

 en tenant compte ä la fois de l'anatomie et des caracteres morpho- 

 logiques. 



On peut d'autre part justifier le sectionnement de cette famille 

 en deux tribus qui sont: 1° les Canariees, definies par la presence 

 de faisceaux anormaux dans la tige ou au moins dans la feuille, par 

 la fieur du type 3, par le fruit indehiscent ä un seul noyau renfer- 

 mant 1 — 3 embryons ä cotyledons lobes ou composes; 2° les Pro- 

 tiees, sans faisceaux anormaux, ä fleurs du type 5 ou 4, ä fruit 

 indehiscent ä un ou plusieurs noyaux, ä cotyledons variables. 



L'ensemble de ces caracteres fait ranger les Burseracees entre 

 les Rutacees et les Anacardiacees. C. Queva. 



Hill, E. J„ Pollina tion in Linaria with special reference 

 to cleistogamy. (Bot. Gaz. XL VII. p. 454—466. fig. 1—4. 1909.) 



A consideration of pollination by insects is followed by a de- 

 scription of the cleistogamic condition. The relative advantages of 

 the two modes is discussed as well as the effect of light and heat 

 in the production of cleistogamy. L. canadensis is considered an 

 example in degeneracy, the flowers passing through decadent stages 

 to cleistogamy. Trelease. 



Hume, H. H., Non-fruiting of Japan persimmons due to lack 

 of pollen. (Science. II XXX. p. 308— 309. 1909.) 



Examination of hundreds of flowers of different varieties of 

 Diospyros Kaki, shows that the stamens are abortive and no pollen 

 is borne in them. There is no record of male trees having been 

 brought to America and the insufficient supply of pollen is the 

 reason that the Japan persimmon so frequently sets no fruit or 

 only produces a light crop. A change in orchard practice is recom- 

 mended. Trelease. 



Benson, M. and E. J. Welsford. The morphology of the 

 Ovule and Female Flow er of Juglans regia and a few 

 allied gener a. (Ann. of Bot. XCII. p. 623—633. 111. 1909.) 



The morphology of Juglans regia was worked out by Van 

 Tieghem in 1869, but his results were published without figures. 

 The present paper confirms Van Tieghem's description, and 

 illustrates the morphology b}>- means of numerous text-figures. A 

 description of several related types is introduced for comparison. 



The placental bundles are found to be built up from leaf traces 

 given off at the base of the flower to the carpels. The authors 

 agree with Van Tieghem that the so-called basal and orthotro- 

 pous ovule is truly appendicular, parietal and anatropous, and add 

 that if we knew more of the phylogenetic history of the basal ovule 

 in other families it might be ciearly demonstrated that it admit- 

 ted the sa'me interpretation. As an instance of this, the authors 

 reexamine the ovule of Myrica gale, and conclude that the ovule is 

 here appendicular. They consider that Miss Kershaw, who recently 

 described the ovule of this plant, misinterpreted the arrangement of 

 the vascular bundles. Agnes Arber (Cambridge). 



