10 HISTORICAL SKETCH. 



de Nancy /'1 843); and the following works are especially- 

 deserving of notice, viz. the Ruhi Germanici of Weihe 

 and Kees v. E.-enbech (1822 — 27); the Flore du centre 

 de la France, by Professor Boreau, edition 3 (1857); a 

 valuable paper by Dr Metsch entitled Ruhi Henneher genres, 

 which will be found in the Linncea (xxviii. p. 89), published 

 in 1858, although dated 1856 on the title-page; and Garcke'a 

 Flora von Nord- und Mittel-Deutschland, ed. 7 (1865). 



An interesting history of the study of this geuus on the 

 continent will be found in Grodron's paper entitled Le genus 

 Ruhus considere au j)oint de mie de Vesjyece. It is included 

 in the Memoir es de la Societe des Sciences de Nancy 

 (1849, p. 210), and contains some exceedingly good remarks 

 upon the distinctness of species in opposition to those 

 botanists who with Gmelin and Bentham only recognize the 

 Linnsean species, or with Spenner admit only one fruticose 

 Ruhus into the flora of Euroi)e. He shows that neither 

 climate, soil, nor variations of light and shade, nor even 

 cultivation, will produce those changes in the form and 

 direction of the stem, the shape and texture of the leaves, 

 the outline and structure of the panicle, the shape of the 

 petals, and the kind of fruit, which are requisite if the 

 theory of the authors just mentioned is adopted. An essay- 

 entitled De Vetvde specijique du genre Ruhus {Gongres Scierv- 

 tijique de France, 28 Session, t. iii.) by the Abbe Chaboisseau, 

 is a valuable contribution to the literature of this subject. 



I may also refer to the Essays of M. Genevier contained 

 in the Mem. Soc. Acad, d' Aiiger (vols. viii. and x.), and the 

 Pi.uhi Genevenses of Dr Mercier attached to Beuter's Flore de 

 Geneve. 



