28. TAMARISCACE^. 385 



Range of mean annual temperature 52 — 43. 



Native, Uliginal and Inundatal. Frequent in Eng- 

 land ; less so in Scotland. Authorities can be cited for 

 all the provinces, excepting that of the Lakes, where I am 

 almost confident of having seen it myself Two counties 

 are omitted in the estimate, because the plant is unnoticed 

 in the lists for Shetland and the Hebrides. The presump- 

 tion appears in favour of its occurrence in all the other 

 counties. 



392. Tamarix anglica, Webb. 



Area (12 3 4). 



Alien. Not even a naturalized plant in England ; 

 since, as far as hitherto shown, it grows only in places 

 where it has been planted. The original locality of St. 

 Michael's Mount, Cornwall, has no semblance whatever of 

 being a native habitat. The lilacs and lib urnums of our 

 gardens are more naturalized than is this Tamarix, for 

 they do spring freely and spontaneously from seed; and 

 thus wotild spread themselves over the land if not de- 

 stroyed. 



393. Bryonia dioica, Liun. 



Area 1 2 3 4 5 * 7 8 9 10 11. 



South limit in (Devon .''), Dorset, Wight, Kent. 

 North limit in Durham, Yorkshire, Cheshire. 

 Estimate of provinces 11. Estimate of counties 40. 

 Latitude 50 — 55. English type of distribution. 

 Agrarian region. Inferagraraian '• — Midagrarian zones. 

 Descends to the coast level, in the Peninsula. 



3 I) 



