288 Notices respecting New Books. 



turns out to be nothing more than a variety of nutans, as Sper- 

 gula pentandra E. B. does of arvensis. 



The genus Euphorbia is removed from the class Dodecan- 

 dria to Moncecia Monandria. That which Linnaeus and 

 others took for stamens appears to be distinct barren flowers, 

 destitute of calyx and corol ; and each consisting of a stamen, 

 distinguished from its stalk by a separating joint only, occa- 

 sionally marked with some discoloration. 



We may be permitted, perhaps, to differ from our author 

 in considering the Mespilus sativa of the old authors as our 

 Wild Medlar, which is called the Nottingham Medlar. The 

 Pyrus hybrida of his former works seems to have included two 

 distinct plants ; — the Scotch species from the Isle of Arran, 

 being the P. pinnatifida of Ehrh. Beitr. ; and Hudson's 

 plant, which appears to be a variety of P. Aria. Spiraea sali- 

 cifolia, hitherto considered so doubtful a native, now stands 

 on the authority of several habitats, though none of those 

 which are pointed out appear to set the question completely 

 at rest. 



Our supreme favourites, the Roses, have undergone a tho- 

 rough revision ; and the published labours of Mr. Woods 

 and Mr. Lindley, as well as the important remarks of Mr. 

 Sabine and Mr. E. Forster, have greatly contributed to the 

 illustration of this most difficult family. The author takes the 

 middle path between Mr. Woods, who, as he apprehends, 

 has created too many species, and Mr. Lindley, who has been 

 led to combine too many. In the study of a genus hitherto 

 imperfectly understood, he considers the former as the least 

 injurious error. " Corrected judgement may hereafter," he 

 observes, " combine what precise observation, in the first 

 instance, has separated ;" and it is a fortunate occurrence for 

 science, that the minute analysis to which the genus has 

 been subjected by Mr. Woods, has been conducted by a 

 naturalist at once acute and correct. Rosa cinnamomea 

 seems to have scarcely any claim to a place in the British 

 Flora, as it is not now to be found in the wood near Ponte- 

 fract, and was probably at first only an escape from a garden. 

 R. Do?iia?ia, Sabini, which is the finest Rose we possess, 

 sarmentacea, bractescens, and dumetorum are new species added 

 by Mr. Woods. R. subglobosa and Forster i are additions of 

 the present author. R. villosa E. B. is R. gracilis of Woods, 

 and of the present work ; R. mollis is R. villosa ,■ R. scabrius- 

 cula is made a variety of tomentosa : R. dumetorum is R. Bor- 

 reri ; and R. collina is R. systyla. 



It has been found necessary to revise the Rubi in a similar 



manner, 



