THE HIGH ALPINE FLORA OF BRITAIN 249 



and Wilkomm's excellent description very fairly covers these British 

 examples, which agree in the ribs of the calyx being hairy with 

 bare intercostal spaces. Mr. G. C. Druce goes into many details 

 in his critical remarks on the sea-thrift in a paper in "Journ. Linn. 

 Soc." xxxv. 66 (1901), but does not clinch the crucial fact nor 

 solve the puzzle of Syme's var. planifolia. Linnaeus is so incon- 

 sistent and indefinite in his use of the generic names of Statice and 

 Armeria, that most botanists will prefer to follow Willdenow who 

 separated the thrifts from the sea-lavenders and called them Armeria, 

 And as Boissier in his monograph follows Willdenow, the common- 

 sense view is on their side. 



Fam. 10. ERICACEAE. 



35. Calluna vulgaris, Salisbury. Ascends to 1005 m. in Aber- 

 deenshire (Watson, " Cyb. Brit." ii. 151), and to the same height 

 on Been-keragh, though very stunted in growth at this level 

 on the neighbouring Cam Tual it struggles up to 990 m. (Hart, 



1 88 1, in "Proc. Roy. Irish Acad." 1882, 577). Descends to sea- 

 level in Cork. 



Fam. ii. RHODORACE/E. 



36. Azalea proa/mbe>is, L. Near the top of Ben Lawers (R. 

 Brown, 1793, in Herb. Brit). Top of Ben-na-Bourd, "sides 

 and top of Ben Bourde about eight miles from Invercauld " (R. 

 Brown, 1794, in Herb. Brit.). "On the heathy summits of most 

 of the mountains of Scotland" (Smith, "English Fl." i. 283). At 

 such elevations it is found on dry stony ridges. 



Fam. 12. SlPHONANDRACE^E. 



37. Vacdnium myrtillus, L. Ascends to 1280 m. on Ben 

 Macdhui (Dickie, 105); and to 1190 m. on the mountains of the 

 Breadalbane district ("Fl. Perthsh." 211), as on Ben Lawers (which 

 is the only mountain in Perthshire which attains this height). 

 Summit of Schiehallion (White). Ascends to 1130 m. on Ben-na- 

 Bourd, on the table-top (Watson, 1832). On the summits of Carn 

 Tual and Beenkeragh (Hart, 1881, in "Proc. Roy. Irish Acad." 



1882, 577). Descends to sea-level in Cork. 



38. Vacdnium vitis-idcea, L. Ascends to 1080 m. on the 

 mountains of the Rannoch district ("Fl. Perthsh." 211), as on 

 Schiehallion. Descends to 30 m. in Armagh. 



Fam. 13. PYROLACE^E. 



39. Pyrola minor, L. Ascends to 1130 m. on alpine rock 

 ledges in the Breadalbane district (" Fl. Perthsh." 215). Descends 

 to sea-level in Londonderry. 



