Floristik, Geographie, Systematik etc. — Pflanzenchemie. 155 



tung gehabt haben, als jetzt. — Es wäre nach Verf. auch zu unter- 

 suchen, ob nicht auch einige der an der Nordseite der Alpen vor- 

 kommenden nordischen Pflanzen dergleichen subatlantische Glacial- 

 relikte sind. 



In der jetzigen Zeit sind mehrere xerothermische Elemente nicht 

 nur in Schweden, sondern auch in verschiedene Teile von Central- 

 europa unter Mithilfe der Kultur eingewandert und dort weiter 

 verbreitet worden. Grevillius (Kempen a. Rh.) 



Small, J. K., Additions to the flora of peninsular Florida. 

 (Bull. Torr. bot. Gl. XXXVI. p. 159—164. Ma}-, 1909.) 



Includes, as new; Thysanella robusta, Waren Cavteri, Cracca 

 corallicola, Goniostachyuni citroswn, Phyla stoechadijolia {Verbena 

 stoechadifolia L.), and Melanthera radiata. Trelease. 



Standley, P. C, Notes on the flora of the Pecos River Na- 

 tional Forest. (Muhlenbergia V. p. 17—30. Feb. 27, 1909.) 



A general account of the Vegetation with a list of species not 

 before reported for the region, including the following new names: 

 Androcera heterodoxa {Solanum heterodoxuni Dunal), Erigeron peco- 

 seusis and Ratibida tagetes cinerea. Trelease. 



Turner, F., Australian Pasture Herbs. fKew Bull. I. p. 12 — 16. 



1909.) 



Notes on economic value of plants other than grasses or salt- 

 bushes. Trigonella suavissima for stock, also used as a vegetable; 

 Erodium cygnoriim, widely distributed and superior for horses, 

 disliked by sheep-owners because fruits stick in wool; Geraninrn 

 dissectum, a perennial which withstands drought; Boerhavia diffusa 

 or pigweed; Marsilea Druinniondii or Nardoo, grows like a dwart 

 clover on margins of swamps or in dried up pools and is eaten by 

 stock, the fruits used as food by aborigines; Daucus brachiatus or 

 native carrot; Psoralen tenax and Swainsonia spp. are known as 

 native Lucer ne; Plantago varia and other species provide good 

 pasturage, while the seeds are collected by settlers under the name 

 wild sago; Calandrinia balonensis or Parakeelya is valuable in 

 waterless warm regions; Tetragonia expnnsn on Warrigal Cabbage 

 is used as a table vegetable and as fodder. W. G. Smith. 



Bertrand., G. et M. Javillier. Sur le silicotungstate de ni- 

 . cotine et sur le dosage de cet alcaloide. (Bull. Sc. pharm. 

 XVI. p. 7. 1909.) 



On extrait Talcaloide par traitements successifs avec de l'acide 

 chlorhj^drique ä 5 '^/qq, on precipite la nicotine de la liqueur acide 

 par addition d'acide silicotungstique ou de silicotungstate de potas- 

 sium en Solution ä 10 ou 20'^/fv. On decompose le silicotungstate de 

 nicotine en distillant en presence de magnesie calcinee, la nicotine 

 distille; onla dose alors volumetriquement par SO^H- ä 3,024 g. par 

 litre en se servant d'alizarine sulfoconjuguee comme indicateur. 



F. Jadin. 



