88. PTERIDIOIDES. 307 



Native. Paludal. Some slight degi'ee of uncertainty 

 attaches to the liighest station for this species ; namely, 

 in the small loch (Ceandu ?) below the original Aberdeen- 

 shire station for Carex Vahlii, and full 700 yards above 

 the sea. I find no other station mentioned among my 

 notes that is within 200 yards of that altitude ; and having 

 brought away no specimen, it seems not very improbable 

 that I may have inadvertently entered the wrong specific 

 name in my note-book. That small loch is so embosomed 

 among the momitains, that the vegetation around it, even 

 at little more than 700 yards, alreadj'- assumes almost the 

 midarctic character; Hieracium alpinum, for example, 

 gi'owing on the stony heath close at hand. 



Equisetum fluviatile of Newman, excluding the xm- 

 branched form, or E. limosum, is said not to be identical 

 with the Swedish species so named by Fries ; (See Bab. 

 Man. ed. 3, 3.) The E. fluviatile of English botanists, 

 until quite recently, intended E. Telmateia ; now, the 

 name maybe said to mean the branched state of E. limo- 

 sum ; scarcely a variety, because passing so veiy gradually 

 one into the other. 



1436. Equisetum hyemale, Linn. 



Area [1 3] 3 4 5 7 8 9 10 11 13 13 14 15 * 17. 



South limit in Surrey, Glamorgan, ? 



North limit in Ross, Moray, Aberdeen or Kincardine. 

 Estimate of j)rovinces 14. Estimate of counties 30. 

 Latitude 51 — 58. Scottish tj-pe of distribution. 

 Agi-arian region. Inferagrarian — Superagrarian zones. 

 Descends nearly to the coast level, in Thames. 



