mackay’s equisetum. 
25 
t MACKAY’S EQUISETUM, {natural size). 
Equisetum Mackaii, Newman. 
Equisetum elongatum., Hooker. 
This plant occurs in the North of Ireland, more particularly 
in the counties Derry and Antrim. Since the publication of 
this species in ^ The Phytologist,’ Dr. Scouler has informed me 
that it was first found by Mr. Whitla in Colin Glen, near Belfast, 
and afterwards in the Deer-park near Glen arm, and was recog- 
nized by that gentleman as a distinct species ; but Mr. Mackay, 
alluding to this discovery in his ‘ Flora Hibcrnica,’ writes thus. 
