80. GRAMINA. 187 



there might suggest a partial explanation ; although it 

 would not explain how the A. planiculmis came to stand 

 in the place of A. pratensis or pubescens in the garden. 

 Errors are constantly arising in large collections by the 

 transposition of labels, or by the death of one species and 

 the appearance of another in its place from seeds acci- 

 dently reaching that precise spot. 



1310. AVENA PUBESCENS, Lmn. 



Ai-ea 1 2 3 4 5 6 7 8 9 10 11 -;^ 13 14 15 16 17 18. 



South limit in Cornwall, Isle of Wight, Kent. 



North limit in Orkney, Ross. 



Estimate of provinces 18. Estimate of counties 70. 



Latitude 50 — 60. British type of distribution. 



A. A. regions. Inferagi-arian — Inferarctic zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 500 yards, in the East Highlands. 



Range of mean annual temperature 52 — 42. 



Native. Pascual, Rupestral. Probably rare above the 

 agrarian region ; and apparently much less frequent than 

 A. pratensis in Scotland generally. I possess a specimen 

 from Orknej^ and the Rev. Churchill Babington reported 

 it to me as found by himself at Lubcroy in Ross-shire. I 

 have seen examples of it labelled and distributed as the 

 A. alpina by a well-known Scottish botanist. 



1311. AvENA FLAVESCENS, Limi. 



Area 1 2 3 4 5 6 7 8 9 10 11 12 * 14 15 * * [18]. 

 South limit in Cornwall, Isle of Wight, Kent. 

 North limit in Aberdeen, Forfar, Stirling. 



