40 ANNALS OF SCOTTISH NATURAL HISTORY 



Carex atrata. Mountain-plateaux only. 1600 feet in Perth (White) 

 is lowest I can find. 



Carex pulla. 1170 feet, 1300 feet, 1610 feet (Faroe). 2200 feet 

 in Perth (White). 



Poa alpina. Mountain-plateaux, and occasionally descending lower. 

 1000 feet in Perth. 



Poa glauca. Found in the lower regions and in the mountain- 

 plateaux. Scotland, descending to 400 feet ("Fl. Perth," p. 

 352). 



Of these plants that do not occur in the four most northern vice- 

 counties of Scotland, the most remarkable as occurring in the Faroes 

 are Sagina nivah's, Cerastium trigynum, Saxifraga ccespitosa, S. rivu- 

 /an's, Juncus biglumis, and Luzula arciiata. These are species in 

 Scotland not recorded from below 20002500 feet; and though 

 there are hills above 2000 feet in Caithness and the Outer Hebrides 

 they are nowhere recorded from them. It may seem that the 

 geological formation may have something to do with this, as it is 

 absolutely of one formation, or the products of it, in the Faroes. 



ALIEN PLANTS. 

 By JAMES FRASER. 



THE following list consists mainly of Alien Plants seen 

 during 1908, but a few of them, observed during the three 

 or four preceding years, have only now been identified. 



In August last, under the guidance of Miss Hayward of 

 Galashiels, the banks of the river Tweed from Abbotsford to 

 Leaderfoot were examined for alien plants, and about one 

 hundred and twenty species were observed, nearly all wool 

 and hide introductions which escaped from the mills on the 

 Gala, the Ettrick, and the Tweed. Many of them are 

 natives of Australia, the Cape, the Argentine, and Chili, and 

 had not previously been found in Britain. 



As in previous papers, the following names under each 

 Natural Order are arranged in rough alphabetical order : an 

 asterisk in front of a name indicates a new British record : 

 a = once found; ft = twice or thrice, but rare; 7 = neither 

 rare nor frequent ; 8 = frequent ; e = abundant : the name 



