50. GENTIANACE.E. 169 



718. Gentiana verna, Linn. 



Area ^^ ^^ [3] ***** ^j. 10 11 12. 



South limit in York, North Lancashire ? 



North limit in Durham, Westmoreland ? 



Estimate of provinces 3. Estimate of counties 3. 



Latitude 54 — 55. Local type of distribution. 



A. A. regions. Superagrarian — Inferarctic zones. 



Descends to 300 or 400 yards, more or less. 



Ascends to 850 yards, in Humber (J. Backhouse). 



Range of mean annual temperature 44 — 40. 



Native. Pascual ? Having never visited the localities of 

 this species, I am unable to fix its geographical relations 

 with sufficient exactness, from the information recorded by 

 other botanists. On the authority of Mr. R. Chambers, 

 (Mag. Nat. Hist. n. s. ii. 38), it was found in '* chalky 

 meadows between Tring and Aston Clinton ;" but some 

 mistake of the species doubtless occurred. It has been 

 collected by numerous botanists in Teesdale, and appa- 

 rently both on the Yorkshire and Durham sides of the 

 Tees river. In Jopling's Sketch of Furness and Cartmell, 

 Mr. Aiton states that it has been found among the hills 

 in the North of Furness, — a northern portion of Lanca- 

 shire, physically belonging to the Lake province, and 

 therefore considered as part of Westmoreland in this work. 

 And the Rev. J. Harriman recorded (B.G.) the locality of 

 Birkdale, in the parish of Appleby. Sir Walter Trevelyan 

 informed me that it occurs in the superagrarian zone 

 (" upland zone," of the Outlines) ; and Mr. James Back- 

 house, in Phytologist, i. 893, mentions that " the top of 

 Micklc-fell (the highest mountain in Yorkshire, being 2600 

 feet above the sea) is limestone covered with grass, thickly 



