CHAP. XVI THE BRITISH ISLES 361 



characters distinguishing them have been tested by culti- 

 vation under new conditions, and I am now enabled to 

 give a much more extensive list of the species or forms 

 which at present seem to be peculiar. For the following 

 list I was primarily indebted to Mr. Arthur Bennett of 

 Croydon, and for the present edition I have obtained the 

 assistance of Mr. W. H. Beeby and Messrs. H. & J. Groves, 

 and the present list is the result of a final revision by 

 the latter gentlemen. All these are well known for their 

 devotion to the critical study of British plants. 



List of Species, Sub-species, and Varieties of Flowering Plants 

 FOUND in Great Britain or Ireland, but not at present 

 known in Continental Europe. Sir Joseph Hooker's I^otes 

 in the former edition are also given. 



1. Kanunculus aquatilis, i/'ar. cambricus (Ar. Beiiii.). Anglesey. Perhaps 



an extreme form of R. fluitans (Lam.). 



2. R. SCO ticus (Marshall). Scottish Highlands and Ireland. "Perhaps 



a sub-species of R. Flammula." (Groves.) 



3. Caltha radicans (Forst.). "A much disputed species, or form of C. 



palustris. It is a relatively rare plant;" (J. D. H.) *' Certainly 

 distinct from the Scandinavian form." (Ar. Bennett.) 



4. Arabis ciliata (R. Br. ) In Nyman's Conspectus Floroe Europccce this 



species is given as found in England and Ireland only. 



" A very much disputed form of a plant of very wide distribution 

 in Europe and North America." (J. D. H.) 



5. Brassica monensis (Huds. ). *'This and the continental B. Cheiranthus 



(also found in Corn\iall) are barely distinguishable from one 

 another." (J. D. H.) 



6. Cochlearia micacea (Marshall). Perth, Argyll. *' Closely related to 



C. alpina." (Groves.) 



7. Lepidium Smithii (Hook.), i;ar. alatostyla (Towns.). Hampshire. 



8. *Helianthemum guttatum (Mill), var, Breweri (Planch). Anglesey. 



" Very doubtful local plant. H. guttatum (true) has lately been 

 found in the same locality." (J. D. H. ) 



9. *Polygala vulgaris (L.), var. grandiflora (Bab.). Sligo, Ireland. "A 



very distinct variety. " (J. D. H.) 



10. Sagina Boydii (F. B. White). Braemar. *' Apparently a distinct 



species." (Groves.) 



11. *Geranium sanguineum (L.), var, lancastriense (With.). Lancashire. 



Mr. Bennett writes : "I have grown G. sanguineum and its pros- 

 trate variety in sand, and neither became lancastriense." 



12. Genista tinctoria (L.), var. humifusa (Dickson). Cornwall. '*A 



decumbent hairy form confined to the Lizard." (J. D. H.) 



13. *Trifolium repens (L.), var. Townsendii (Bab.). Scilly Isles. **A 



well-marked form by its rose-purple flowers. Confined to the Scilly 

 Isles." (J. D. H.) 



14. Rosa tomentosa, var. Woodsiana (Groves). 



15. Rosa hibernica, var. Grovesii (Baker). "R. hibernica is now considered 



a hybrid." (Groves.) 



