476 80. ALISMACE^. 



North limit in Ross, AbCTdeen, Argyle. 



Estimate of provinces 17. Estimate of counties 70. 



Latitude 50 — 58. British type of distribution. 



Agrarian region. Inferagi-arian — Superagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 100 or 200 yards, in England. 



Range of mean annual temperature 52 — 47. 



Native. Paludal. Much less common than A. Plan- 

 tago ; but with a very similar provincial area, comital es- 

 timate, range of latitude, &c. Although their distribution 

 in Britain is thus so nearly alike, yet in Scandinavia the 

 difference between them is wide in this respect ; A. Plan- 

 tago being generally spread through Scandinavia, includ- 

 ing Finland and Lapland, while A. ranunculoides is re- 

 stricted to Denmark and the most southern portion of 

 Sweden, according to the ' Summa Vegetabilium ' of Fries. 



1111. Alisma natans, Linn. 



Area ^ * [3] * 5 6 7 * * [10 * 12] 13. 



South limit in Glamorgan, Salop, Merioneth. 



North limit in Wigton, Anglesea, Caernarvon. 



Estimate of provinces 4. Estimate of counties 8. 



Latitude 51 — 55. Atlantic (?) type of distribution. 



Agrarian region. Inferagrarian — Midagrarian zones. 



Descends to the coast level, or nearly so. 



Ascends to 200 yards, less or more, in England. 



Range of mean annual temperature 49 — 47. 



Native. Lacustral. Peculiar and rather uncertain in 

 its distribution. Disregarding its enumeration among the 

 metropolitan plants, by Daniel Cooper, the counties in 

 which it has been reported are those of Worcester (Mr. A. 

 Aiken; Mr. E. Lees), Salop (Rev. A. Bloxam, &c.). He- 



