DISTRIBUTION OF BRITISH PLANTS. 357 



cum), a cottony plant, with white or rose-coloured composite 

 flowers ; a Hawkweed (Hieracium alpinum) ; the Bound- 

 headed Sedge (Carex piluli/era) ; Orchis maculata ; common 

 Butterwort (Pinguicula vulgaris] ; Dog Violet (Viola ca- 

 nina) ; a Crowfoot (Ranunculus acris) ; the pretty Eye- 

 bright (Eupkrasia officinalis) ; the shrub, so often mentioned 

 before, called Cowberry (Vaccinium Vitis-Id<%a}, with 

 myrtle-like leaves and clusters of drooping bell-shaped 

 blossoms ; a species of Grass (Molinia c&rulea) ; the little 

 blue Harebell (Campanula rotundifolia] ; Great Wood-rush 

 (Luzula sylva-tica), and Juncus sguarrosus ; another kind of 

 Cotton-grass (Eriophorum vaginatum) ; Meadow-rue (Tha- 

 lictrum alpinum) ; Yellow Eattle (RhinantJius Crista-galli] 

 the pretty Milkwort (Polygala vulgaris) ; Eed Bearberry 

 (Arbutus Uva-ursi) ; and here the Erica Tetralix shows us 

 that we have reached the lower limit of this zone (2370 

 feet). 



The species observed in descending from the station of 

 Erica Tetralix to that of the Thorny Broom (Genista Anglica) 

 are, first of all, a Sedge (Carex- flavd] ; Bog Asphodel 

 (Narthecium ossifragum) ; a species of Rush (Juncus su- 

 pinns) ; the Sundew (Drosera rotundifolia}, that curious 

 little plant so well known to many by description, but 



