436 ADDITIONAL NOTES, ETC. 



will tlius be carried into the counties mentioned. The 

 provincial estimate will rise to 7 ; and the comital estimate 

 to 8, ijossibly 10, ascertained comities. The range of la- 

 titude will be 53 — 57. Professor Arnott considers the 

 altitude in Lanarkshii-e rather below 100 yards. 



425. Saxifraga aizoides, vol. i. p. 410. 



Having been ascertained in 20 counties, exclusively of 

 the alleged stations in those of Derby and Chester, per- 

 haps the comital estimate should be raised to 25 ; Stu-ling, 

 Caithness, Hebrides, Shetland, remaining unrecorded for 

 it, equally with all the Lowland counties, excej)tmg that 

 of Ayr. Descends to the drains by Newtyle and Glammis 

 Railway, in Forfarshire, according to Gardiner. In the 

 British Flora, edition 6, it is stated to grow in Wales, but 

 no authority is cited in support of the statement. 



426. Saxifraga oppositifolia, vol. i. j). 411. 



Province 13 may be added to the true or natural area, 

 on authority of Mr. William Stevens, who observed this 

 species and S. stellaris " at the face of the Grey Mare's- 

 tail." Perhaps the " tail " may be a water-fall, and have 

 a " face," to which S. oj)]positifolia will furnish a purple 

 beard. The counties of Westmoreland, Dumfries, and 

 Dumbarton have been added to the ascei-tamed habitats : 

 so that the estimated census may now be raised to 20 

 comities, including 18 certain. 



427. Saxifraga granulata, vol. i. p. 413. 



Mr. J. T. Syme informs me that Miss BosweU has found 

 this species in Orlaiey ; but it seems safer at present to 

 receive the plant as only doubtfully native there. Mr. J. 

 G. Baker finds it ascending to 350 yards in the province 

 of Humber ; and this altitude may perhaps require a re- 

 duction of temperature to 45 or 44 at the lower figure of 

 the range. 



