348 63. POLYGONACE^. 



Estimate of provinces 12. Estimate of counties 30. 



Latitude 50 — 55 (58). English type of distribution. 



Agrarian region. Inferagrarian — Midagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 100 yards, less or more, in England. 



Range of mean annual temperature 51 — 47. 



Native. Paludal, Littoral. Several of the localities on 

 record for one or other of these plants, if divided, cannot 

 be satisfactorily assigned to either of them ; authors hav- 

 ing repeatedly expressed doubts or uncertainty respecting 

 the particular species which was intended by them. Nor 

 do I myself feel prepared to distinguish the two quasi-spe- 

 cies in any confident manner. I have never seen a Scot- 

 tish example of either of the alleged species, and receive 

 the recorded localities with some distrust. In the pi'ovince 

 of Tyne, it would seem, both have been found, though only 

 on the ballast-hills. 



t RuMEx scuTATUS, Linn. 



Area (6 * * * 10 * 12 * 14). 



Alien. Has become established in the counties of Gla- 

 morgan (Dillwyn, &c.) ; York (Mr. Tatham); Cumberland 

 (H. C. Watson) ; and Edinburgh (Mr. Brand). But it 

 would seem to be very local in each of these counties, and 

 distant firom houses or walls only in Yorkshire, where it is 

 found by Mr. Tatham, at the head of Silverdale. " There 

 were," writes Mr. Tatham, " only four houses in the dale, 

 and the plant was about four hundred yards from the high- 

 est, growing along with Galium boreale, Potentilla alpes- 

 tris, Trollius europseus, Geranium sylvaticum, &c., in the 

 grassy chinks of limestone pavement." 



