Bacteryologie. — Pteridophyten. — Floristik etc. 35 



mittelst einer Flamme erwärmt und hierauf die Mündung der Kapil- 

 lare zugeschmolzen werden. Matouschek (Wien). 



Shreve, F., Studies on Jamaican Ffymenop/iyllaceae. (Bot. 

 Gaz. LI. p. 184-209. March 1911.) 



The title belies the contents of this paper which is almost 

 purely ecologic. The subject matter is treated under the captions 

 of vertical and regional distribution in Jamaica, climatic conditions 

 in the rain forest, local distribution of the Hymenophyllaceae, root 

 absorption, transpiration , effect of total submergence of plant beneath 

 water, absorption of atmospheric moisture, autonomy of the leaf and 

 its cells, the chloroplasts, with general conclusions. The contents 

 may be summarized as follows: These ferns are most abundant in 

 species at about 1525 m. altitude, showing in habit a ränge from 

 pronounced hygrophily to drought resistance. Local distribution is 

 due to differences of conditions from flora to canopy of the forest. 

 As to physiologic relationship, water loss can be met by root ab- 

 sorption, transpiration stops when the plant is totally submerged, 

 and yet many of these ferns are capable of living for considerable 

 periods as submerged aquatics, while as a whole the family has 

 developed forms capable of growing in relatively dry situations 

 through posession of an intracellulary or functional xerophily. The 

 paper is illustrated by figures of records, apparatus and photo- 

 graphs of ferns in the rain forest. J. W. Harshberger. 



Bicknell, E. P., The ferns and floweringplants ofNan- 

 tuckett. VII. (Bull. Torr. bot. Cl. XXXVIII. p. 103-133. Mai, 1911.) 



Dealing eritieally with Rubus, of which genus the following hy- 

 brids are characterized; the author's opinion being that compara- 

 tively few primary species are to be distinguished: Rubus alleghe- 

 niensis X argutus, R. allegheniensis X frondosus, R. allegheniensis 

 X procumbens, R. argutus X frondosus, R. avgutus X nigricans 

 (R. ascendens Bld.), R. argutus X Baileyanus, R. argutus X pro- 

 cumbens, R. argutus X flagellaris, R. ßagellaris X frondosus, R. 

 frondosus X nigricans (R. abbrevians Bld.), R. frondosus X hispidus 

 (R. biformispinus Bld.), R. frondosus X procumbens (R. multispinus 

 Bld.), R. Baileyanus X frondosus, R. Enslenii X frondosus, R. 

 hispidus X nigricans, R. hispidus X procumbens, R. Enslenii X 

 hispidus, R. flagellaris X hispidus, R. Baileyanus X procumbens 

 (R. procumbens rosibaecus), R. Enslenii X procumbens {R. geophilus 

 Bld. in part.), R. flagellaris X procumbens, R. Baileyanus X Enslenii 

 (R. geophilus Bld. in part.), R. Enslenii X flagellaris, and R. Bailey- 

 anus X flagellaris. Trelease. 



Blanchard, R., La limite septentrionale de l'Olivier dans 

 les Alpes frangaises. (La Geographie. Bull. Soc. Geogr. XXII. 

 p. 225—240, 301—324. 4 flg. et carte, oct— nov. 1910.) 



Avec plus de precision que ne l'avaient fait Durand et Ch.Fla- 

 hault, puis Th. Fischer, Tauteur d^termine la limite N. de l'Olivier 

 entre le Rhone et la frontiere franco-italienne. Dans la valfee meme 

 du Rhone, „carrefour de climats", cette limite est indecise: c'est 

 au N. de Rochemaure sur la rive droite et au S. de Donzere 

 sur la rive gauche qu'apparaissent les premiers Oliviers en groupes 

 isoles, mais on n'atteint vraiment qu'aux environs d'Orange le 



