82. ARACE^. 31 



North limit in York, Lancaster ; — (or Renfrew, Ayr.) 



Estimate of provinces 10. Estimate of counties 30. 



Latitude 60 — 55. English type of distribution. 



Agrarian region. Inferagrarian — Midagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 100 yards, more or less, in England. 



Range of mean annual temperature 51 — 48. 



Native. Paludal. Apparently a true native of Britain, 

 although probably introduced to several of its present lo- 

 cahties. The Scottish locality or localities are open to 

 much suspicion. It is said to grow at Lochwhinnoch and 

 Castle Semple Loch, in Renfrewslm-e ; wliich may mean 

 only one single station. And when we find the same lo- 

 cality also reported for Viburnum Lantana, Qilnothera 

 biennis, Lonicera Caprifolium, Valeriana pyrenaica, and 

 Atropa Belladonna, — unlikely plants to be natives there, 

 we are easily led to suspect the introduction also of the 

 Acorus. A specimen is in my herbarium, from Mr. James 

 Smith, labelled "Ayrshire;" but Lochwhinnoch being on 

 the confines of Renfrew and Ayr, this third nominal 

 station may perhaps still be the same with the other two. 

 Mr. Borrer deems the plant introduced into Sussex. Dr. 

 Bromfield had some suspicion that the Acorus was not an 

 aboriginal native of England ; and he was not inclined to 

 err on the side of repudiating plants. 



1144. Spakganium natans, Linn, 

 1144*. Sparganium MINIMUM, " FHes." 



Area general. 



South limit in Somerset, Dorset, Wight, Kent. 



North limit in Orkney, Hebrides, Sutherland. 



