294 BOTANICAL infohmation. 



bore on North American Botany, in the large and important 

 Herbarium of Professor De Candolle of Geneva. Germany 

 was visited : the Herbarium of Willdenow, and the other 

 rich collections of the Royal Berlin Herbarium, under the 

 auspices of the zealous curator, Dr Klotzsch ; the Imperial 

 Herbarium of Vienna, in charge of Dr Endlicher and Dr 

 Fenzl; the Royal collections and Garden of Munich, through 

 the liberality of Dr Von Martius, and Professor Zuccarini ; 

 Schlechtendal's at Halle, possessing as it does so many plants 

 which that author and Chamisso had described from Cali- 

 fornia, and N. W. America, and the Carices and entire Her- 

 barium of Dr Schkuhr ; the plants of Mexico and New 

 Spain, collected by Humboldt and Bonpland, in possession 

 of Professor Kunth ; those of Dr Lehmann of Hamburgh, 

 so rich in Greenland plants, and in the genera Potentillai 

 CEnothera, and family of Boraginece; and lastly, those of the 

 Imperial Academy of Sciences at St Petersburgh, where 

 Dr Trinius and the late M. Bongard laid open to him the 

 various collections that had been received from Russian 

 North America. These most useful investigations, not ac- 

 complished till after the appearance of the first two parts 

 of the Flora, have induced the necessity of making several 

 changes and corrections, which are done with great candour 

 and judgment in an Appendix ox supplement at the end of 

 the volume. " This," they justly observe, "will give the 

 work an important value in respect to authenticity of the 

 specific names, so that future changes of the kind will not be 

 to any considerable extent necessary." 



Nor can we look at the list of American Institutions and 

 Naturalists named in the preface, which have contributed to 

 this great undertaking, without being satisfied that Botany 

 is making rapid strides in the United States ; that a Flora, 

 like that under review, is imperatively called for ; and that 

 it must and will be a powerful means towards making the 

 entire vegetation of this vast continent thoroughly known to 

 the scientific workl. We are anxious that the names of 

 these individuals who have so ably promoted the cause of 



