The Scottish Naturalist. 23 



specimen sent to Dr. Lange was scarcely sufficient to enable him 

 to speak with certainty. 



Viola palustris L. Occasionally in bogs and stony margins 

 of lakes. " Remarkable for its often apiculate, not very broad 

 leaves." (Herr Mtirbeck.) 



V. sylvatica Fr. Here and there, chiefly near the sea level, 

 including V. Riviniana Reich. About Baltasound, Unst. t V. 

 .silvestris Reich. (ReichenbacJiiana). N. About Ollaberry; rocks 

 about Eela Water. Herr Murbeck considers that a slight doubt 

 attaches to the last, owing to late condition, &c. 



V. canina Reich. Here and there, and reaching much greater 

 altitudes than the last two. 



V. tricolor L. Very large flowered forms in Unst. I did not 

 note arvmsis, but Edmondston's description shows that it occurs. 



Drosera rotundifolia L. The only species seen. Y. 

 Sparingly between Ulsta and Mid Yell. N. Sparingly near Hills- 

 wick. 



Polygala serpyllacea \V r eihe. Common, and the only 

 form seen. 



Cerastium tetrandrum Curtis. Common about the coast. 

 I failed to find C. semidecandrum, the previous record of which 

 is probably an error. 



C. triviale Link. Common and much more extended in its 

 range than C. glomeratum, which does not seem to get far above 

 sea level. Var. alpestre Hartm. U. A single plant on Burrafirth 

 sands, doubtless sprung from seed fallen from the cliffs. N. Wet 

 places near Ollaberry. The latter a taller and remarkably large- 

 flowered form. Mr. Craig-Christie mentions a similar form at 

 Baltasound, but I was unable to find it. Another form occurs 

 sparingly scattered over the Serpentine hills about Baltasound, and 

 is very noticeable on account of its short, strict habit, and bright 

 green leaves ; Dr. Lange reports on it " in habit like var. holoste- 

 oides Fr., but it is hairy above." 



* C. longirostre Wichura. N. Grassy places among rocks 

 by the coast at Ollaberry ; seen nowhere else. Named by Dr. 

 Lange, who remarks " seems an extended form of C. vulcjatum? 

 A remarkably large plant, with leaves ij inches and more in 

 length ; capsule nearly f inch. It seems to differ from C. triviale 

 in several characters, and I hope to grow it from seed. Placed as 

 a sub-species by Nyman ; occurs in Iceland, Faroes, Scandinavia 

 &c. 



