2l6 



The Scottish Naturalist. 



Veronica SCUtellata L. — By the East Mires Burn, Loch 

 of Lumbister, Yell ; a second station for this very rare 

 species. 



X Oxyria digyna Hill.— Wet rocks on the south side of 

 Roeness Voe ; abundant, over a very restricted area, from the sea 

 level to 30 feet alt. 



Polygonum viviparum L. — Not common ; recorded from 

 near Uyasound by Edmondston, and from Uya Island by Tate ; 

 it also occurs on the top of Roeness Hill, and on the sea-bank at 

 Lea of Setter, Fedaland. 



* Var. alpina Wahl. (forma). A very remarkable form was 

 found at the Lea of Setter, growing with the type but not passing 

 into it. The root-leaves were in many cases quite orbicular, in 

 others broadly oblong-oval, the bulbils being a bright golden 

 yellow colour. The description of Wahlenberg's variety may be 

 applied to this plant, of which, however, it is certainly a very ex- 

 treme form. There is nothing like it in either the British or 

 foreign collections at the British Museum. I have, however, a 

 plant from " Hels, Stocke," in my own Scandinavian collection, 

 which approaches it in the leaves being broader than is usual in 

 the type, and in the bulbils being of a darkish orange colour ; this 

 is labelled " var. alpina Wahl." I have also another Scandinavian 

 plant in which the leaves are broader than in the Norwegian 

 alpina^ though having the ordinary dull purple bulbils. It ap- 

 pears, therefore, that these characters are to some extent inter- 

 changeable ; and although the Shetland plant is a much more 

 extreme form than any other that I have seen, it is perhaps 

 scarcely desirable to give it a separate name. 



X Populus tremula L. — Cliffs on the north side of Roeness 

 Voe, near Feal. I have no doubt that this is the " P. nigra "of 

 Edmondston's Flora. 



Salix aurita L. — This is rather common in the northern part 

 of Mainland. S. cinerea appears to be absent from the county ; 

 Edmondston's Gluss Burn "aquatica" is S. aurita ! The S. cinerea 

 mentioned in my 1887 report must be held to be a doubtful 

 plant ; Dr. Lange queried it as a variety of that species, but I 

 have since thought that it may more probably be a form of 

 S. ambigua, an opinion which is confirmed by Dr. F. B. White, 

 who thinks that it has nothing to do with S. cinerea. 



Salix ambigua Ehrh.— A pretty form of this, growing with 



