170 50. GENTIANACE^. 



interspersed with Gentiana verna." A summit of that alti- 

 tude, in the latitude of Yorkshire, may be held to come 

 slightly within the midarctic zone. 



719. Gentiana Pneumonanthe, Linn.'^ /^'^-X- '^^6 



Area * 2|3J 4 * 6 7 8 9 10 * 12. 



South limit in Dorset, Hants, Sussex. 



North limit in Westmoreland, York. 



Estimate of provinces 8. Estimate of counties 15. 



Latitude 50 — 55. English (?) type of distribution. 



Agrarian region. Inferagrarian — Midagrarian zones. 



Descends to the coast level, in Channel province. 



Ascends to 100 or 200 yards, in England. 



Range of mean annual temperature 50 — 47. 



Native. Ericetal, Uliginal. Nearer to the English type 

 than any other, although rather curiously inclining also 

 towards the opposite or Scottish type of distribution, by 

 its greater frequency in some of the northern counties of 

 England, and its rarity in the middle and southern coun- 

 ties. It occurs in Dorset, South-west Hants, Sussex, 

 Suffolk (now extinct ?), Norfolk, Caermarthen, Anglesea, 

 Leicester, Lincoln, Notts, Derby (extinct ?), Chester, Lan- 

 caster, York, Westmoreland, Cumberland. In addition, 

 the counties of Kent, Surrey, and Middlesex, are also on 

 record ; the first, on account of the species being found 

 near Tonbridge Wells, but the locality is really within 

 Sussex ; the second, through a mistake, between Clapham 

 in Yorkshire, and the place so named in Surrey; the third, 

 on the authority of Dr. Goodenough, may have been cor- 

 rect, but the present existence of the species on Hounslow 

 Heath must be considered to require verification. This is 

 one of the few species enumerated by Professor Edward 



