360 Botanical Excursions into t/ie Highlands in 1883. 



above which we saw one patch. We found it again scattered sparingly 

 through Strath Naver. It is plentiful upon the east coast. 



Draha rupestris — This plant, hitherto confined to Cairngorum and Ben 

 Lawers, was found by Mr Macnab on Ben Hope. 



Erica cinerea, flor. alb — This variety we met with occasionally, but not more 



commonly fhan on other heaths. 



• <i t)')--''»r<i ^i^-''' -lilt- • ■ 



Erica Tetralix, flor. alb — we found to be very common, particularly in the 



middle and western parts of Sutherlandshire. 



Fucus Mackaii — Dr Greville first picked on the shores near Kylestrome. It 

 exists there, and farther north on the same coast, in the utmost abun- 

 dance, but was not found on the north or east coasts. 



Fttctts serraiusjvar. laciniatusj — was gathered by Dr Greville at Erribol Ferry. 



IJieracium nmbellatum — We found this in the station where I formerly ob- 

 served it, near Farr, and in much larger quantity than before. I have 

 never seen it anywhere else in Scotland. Dr Johnston, in his excellent 

 Flora of Berwick-upon-Tweed, mentions a peculiar swelling of the stems 

 of this species from the deposition of the eggs of an insect. Hieracium 

 denticulatum grows abundantly in this station interspersed with H. um- 

 bellatum, and in other parts of the country, and is very frequently so af- 

 fected, but both this season and in 1827, I observed H. umbellatum to be 

 wholly exempt from it. "^^ ••''^^" 



Isoetis lacustris — ^^In the river Oikel, immediately above Invershin, and in se- 

 veral lakes in several parts of the route. 



Juncus baltims — In much greater abundance than formerly noticed, near the 

 shore, behind Keoldale, in the parish of Durness. 



Luzula arctmta, — abounds much more than former observation had led me to 

 believe on the summit of Fonniven, and was also discovered on the ridge 

 leading to the top of Ben More, Assynt, from Inchandamf. 



Malaais paludosa — ^we found on the road-side above Invershin, on the hill be- 

 hind Oikel, near Free Vater, and at Ben Loyal. 



Pihilaria globulifera Road-side above Invershin, plentiflilly. 



Pinguicula Imitanica This species, generally confined to the west coast of 



Britain, we found very abundantly a little above Invershin, and thence 

 by the road-side nearly as far as Oikel. As another eastern station, I 

 may mention that it has been found by Mr Stables in Strath PefFer. 



Primus Padus Road-side near Tongue, and by the side of Loch Naver. 



Prunm spinosa Lower end of Strath Naver, not observed anywhere else in 



the west or north of Sutherland. 



Salix reticulata Sparingly on Ben Hope, picked by Mr Macnab- 



Ulex europeeus — Keoldale, Loch ErriboU, Tongue, Strath Naver, Strath Fleet, 

 and along the east coast of Sutherland. It certainly was originally intro- 

 duced at Tongue, and it may have been in all of the other stations except 

 Strath Naver ; but there, I am convinced, it is native. There seems no 

 possible reason why it should ever have been introduced in such a place, 

 and it occurs in detached plants throughout the whole Strath, about 

 twenty miles long, nowhere in great circumscribed masses, as at Tongue. 

 In Strath Fleet, and at Erribol, it is employed to form fences ; and in 

 aU of the above situations, it grows either at the level of the sea, or in 

 rery moderate elevations. 



