34 



The Scottish Naturalist. 



robust in habit than the wild plants from the stony hills of Unst. 

 It may be inferred from this that the cultivation of all the forms 

 would probably settle, more easily than in many cases, some of the 

 doubtful points connected with the genus. 



X Polygala vulgaris L. — In my first paper I spoke of P. 

 serpyllacea as being the only form noted. I now see that a small 

 plant with an unusually sparsely-flowered raceme gathered at 

 Ronas Voe, and passed over as serpyllacea, must be referred to eu- 

 vulgaris. This is, however, certainly the less common form ; I 

 have not noted it elsewhere ; and all my other specimens belong 

 to P. serpyllacea. 



Oerastium triviale Link var. serpentini Syme. — My large- 

 flowered form from Ollaberry (Scot. Nat., 1887, p. 23), which I 

 had supposed to be the same as Mr. Craig-Christie's plant, is now 

 definitely identified as ^uch by Mr. N. E. Brown. Further exami- 

 nation and local observation convince me that I referred it to var. 

 alpestre erroneously ; and that it is merely a large-flowered form 

 of the ordinary plant, frequent in wet pastures in Shetland, and 

 which passes by degrees into the small-flowered type. I under- 

 stand that Mr. Bennett has this form from Wales, and we have a 

 form nearly as extreme in Surrey. 



% Vicia sepium L. — Sparingly near the upper end of Ting- 

 wall Loch, among a dense growth of Lathyrus pratensis. 



Spirsea Ulmaria L. var. denudata PresL— By the Mailand 

 Burn, Unst, 1887. This variety seems less common in Shetland 

 than in the south. 



Alchemilla vulgaris L. var. subsericea Koch. — Frequent 

 among rocks on Hoo Field, near Cunningsburgh. 



Epilobium palustre L. — Dr. Haussknecht has identified 

 the Clickhimmin Loch plant as var. lavandulatfoiium Lec. et Lam. 

 I still consider the Ronas Voe plant, which has much larger flowers 

 and broader leaves, to be probably the var. fontanum* 



Callitriche polymorpha Lonnr. — I again met with this 

 plant in the Burn of Sundabanks, near Scalloway. As with the 

 Unst plant, so here, the rapid current of the stream soon destroys 

 the long stigmas, and it was difficult to find good examples ; but 

 one or two quite characteristic examples were obtained. In the 

 fresh state the fruit is only very obscurely winged. 



i Siurn erectum Huds. — In some plenty by the Asta Burn. 

 Scalloway. 



