308 88. PTERIDIOIDEfS. 



Ascends to 100 or 200 yards, in England. 



Range of mean annual temperature 49 — 46. 



Native. Paludal. Much suspicion attaches to several 

 of the stations on record for this species. The specimens 

 in my herbarium are from Surrey (Mr. J. D. Salmon), 

 Leicester (Rev. Churchill Babington), Northumberland 

 (Mr. R. B. Bowman), Edinburgh (H. C. Watson), Forfar 

 (Mr. William Gardiner), and Moray (Rev. George Gordon). 

 Among the counties reported, and which more particularly 

 appear to require verification, are those of Somerset, 

 Wilts, Kent, Middlesex, Norfolk, Worcester, Warwick, 

 and Stafford. 



1427. Equisftum Mackah, Newm. 



Area ************** 15. 



South limit in Kincardine ? 



North limit in Aberdeen ? 



Estimate of provinces 1. Estimate of comities 2. 



Latitude 57 — 58. Scottish type of distribution. 



Agrarian region. Midagrarian or Superagrarian zone. 



Decends ? (Below 100 yards ?) 



Ascends to ? 



Range of mean annual temperature, about 47 — 46. 



Native. Inundatal ? Mr. Babington gives this in his 

 Manual, as a species found in Ireland, Scotland, and 

 England. I am not aware what are the English localities. 

 According to the Rev. J. B. Brichan, this one and the 

 preceding and following species all occur along the course 

 of the Dee, where it crosses the northern point of Kin- 

 cardineshire ; but whether the E. Mackaii extends up- 



