3.98 » 34. CRASSULACE^. 



occurs, in the Lowlands, may possibly be below the super- 

 agrarian zone. 



411. Sedum dasyphyllum, Linn, 



■ Area (1 2 3 4 5 * 7 8 ^, 10 * [12] * 14). 



Alien ? Hooker, Henslow and Babington allow this 

 species to pass muster with the genuine natives of Britain ; 

 and Webb and Coleman enumerate it unquestioned in 

 their list of Herts plants. Notwithstanding this weight of 

 authority on one side, T still hesitate to include it even 

 among the denizens. Almost all the localities given in 

 precise terms, refer to walls ; and many of these are on 

 walls to which the plant was very likely to have been intro- 

 duced through cultivation, as, "walls near Kew," — "wall 

 near Chelsea Hospital," — " old Abbey walls," — " garden 

 walls below Clifton," — &c. &c. The few exceptions, in 

 which " hills" and "rocks" are mentioned, rest on authority 

 not in itself strong, and seldom corroborated by any second 

 observer. Under these circumstances, should the species 

 turn out to be indigenous in any part of Britain, it will 

 probably be far more locally so, than is indicated by the 

 area given above. 



412. Seddm anglicum, Linn. 



Area 1 2 3 4 5 6 7 * 9 * 11 12 13 14 15 16 * 18. 

 South limit in Cornwall, Isle of Wight, Kent. 

 North limit in Shetland, Hebrides, Moray. 

 Estimate of provinces 16. Estimate of counties 40. 

 Latitude 50—61. Atlantic type of distribution. 

 A. A. regions. Inferagrarian — Midarclic zones. 



