73. ORCHIDACE.E. 415 



Latitude 50 — 58. British (?) type of distribution. 



Agrarian region. Inferagrarian — Superagrarian zones. 



Descends to the coast level, in Peninsula or Channel. 



Ascends to 200 yards, in East Highlands. 



Range of mean annual temperature 51 — 45. 



Native. Sylvestral, (Parasitic ?). Intermediate between 

 the English and British types of distribution ; approximat- 

 ing to the latter, in its latitudinal area ; but inclining to- 

 wards the English type also, by its greater frequency in 

 England, as well as by its apparent absence from the two 

 most northerly provinces of Scotland. 



/-./^/^ /./>... 



1037. LiSTERA CORDATA, Br. 



Area 1 * * * 5 * 7 8 9 10 11 12 13 14 15 16 17 18. 



South limit in Devon, Somerset, Salop, Derby. 

 '^^ti^'-^ North limit in^Orkney, Sutherland. 

 I Estimate of provinces 14. Estimate of counties 40. 



Latitude 51 — 60. Scottish type of distribution. 



A. A. regions. Midagrarian — Midarctic zones. 

 I Descends to 200 yards, or lower, in the Peninsula. 



Ascends to 850 yards, in East Highlands. 



Range of mean annual temperature 48 — 39. 



Native. Ericetal, Uliginal. The great rarity of this 

 species to the southward of the latitudinal line of 53, con- 

 trasted with its frequency on the northern moors, particu- 

 larly those of the Highland provinces, clearly connects it 

 with the Scottish type of distribution, notwithstanding its 

 occurrence so far south as the Peninsula, in two counties 

 of which it has lately been discovered ; namely, in Devon, 

 by Mr. Ward, and in Somerset, by the Rev. W. H. Cole- 

 man. Mr. Ward found it on Coddon Hill, near Barns- 

 taple, which I suppose to be about 600 feet in height, 



