86. GRAIVHNA. 195 



these two counties has been much augmented, and now 

 exists scattered through so many books, lists, and i^erio- 

 dicals, that it becomes somewhat riskful of error, to state 

 that no record of the species in either county is in exis- 

 tence. In this, as in other such instances, my statement 

 to that effect is to be received as implying only that I find 

 no such record referred to in my own ample collection of 

 notes, — no dovibt far the most ample compilation of notes 

 on the subject ever brought together, but still neither en- 

 tirely complete, nor free from intermingled errors and 

 oversights. I j)robably reckon quite within the true num- 

 ber, in estimating these notes to comprehend 500,000 

 localities. 



1321. Glycebia aquatica, Sm. 



Area 1 2 3 4 5 6 7 8 9 10 11 * 18 14 15. 



South limit in Devon, Dorset, Sussex, Kent. 



North limit in Moray, Aberdeen. 



Estimate of provinces 15. Estimate of counties 60. 



Latitude 50 — 58. English type of distribution. 



Agrarian region. Inferagrarian — 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. By its long area, extending from 

 Devon and Kent northward to Moray, this might seem to 

 belong to the British type of distribution ; but by its 

 census, — its frequency in England, rarity in Scotland, — 

 it is approximated more to the English type. According 

 to the Catalogue issued by the Botanical Society of Edin- 

 biu'gh, indeed, this species is placed in the same class of 

 frequency with Glyceria fluitans. My recollection does 



