1859.] REVIEWS. 315 



consigned, with many of the newly -discovered Rubi, Ranun- 

 culi, etc., to the limbo of oblivion, probably to figure at some 

 distant period among "things not generally known,'^ as disco- 

 veries of West Indian plants in the West Hiding of Yorkshire. 

 Mr. Hobkirk enumerates at least a score of exotics, and names 

 eight of them. Of these latter Digit aria sanguinalis and Seta- 

 ria verticillata are reputed British species, relics of our time- 

 honoured prejudices. 



The author of the ' History, etc., of Huddersfield ' considers 

 its Flora as a rich one. The number of native species is 442, of 

 introduced and alien plants 38, total 470, or 40 per cent, of the 

 Yorkshire Flora. If it be assumed that the diameter of the cir- 

 cle or circular area on which the plants enumerated grow be 

 eight miles, the number of square miles comprehended in the in- 

 vestigated tract will be at least sixty square miles; but under 

 500 plants in such a space is rather a poor Flora in the latitude 

 of Huddersfield. 



An area of sixteen square miles around Hampstead, in Middle- 

 sex, yielded upwards of 670 species of phsenogamous plants and 

 Ferns ; and the soil is of the most uniform and unfavourable na- 

 ture, viz. Bagshot sand, gravel, and plastic clay ; these do not 

 form a surface favourable to the vegetation of a large number 

 of species. A district of the same size in Surrey, including the 

 chalk, iron or green-sand, and of course gravel, marl, clay or 

 gault, etc., yielded about 800 plants, or at least half the entire 

 Flora of the British Isles. 



We will not say that the historian of Huddersfield has over- 

 looked any of the plants ; but it can hardly be said that the dis- 

 trict is rich in the number of species. 



There are some common or frequent plants however which we 

 miss in the list, of which the following are given as examples. 



Order Malvacece. — Mah.m sylvestris. It is well known that in 

 the west and north of England Malva moschata is the commonest 

 Mallow, and ascends several hundred feet above M. sylvestris, 

 but the latter is seldom altogether absent from large tracts of 

 sixty or a hundred square miles. It is found on rubbish in 

 shady places in several parts of Scotland. Is it a total stranger 

 to the vicinity of Huddersfield ? 



In the genus Geranium there are but three species entered, G. 

 molle, G. dissectum, and G. robey^tianwn. The botanists of Hud- 



