PHANEROGAMS AND FERNS OF SOUTH ARDGOIL. a 
complexity, and in the constituents which at various eleva- 
tions and under various soil conditions become dominant. 
The following list is from a small area of dry ground at 
100 feet :— 
Anthoxanthum odoratum. Galium saxatile. 
Triodia decumbens. Trifolium repens. 
Nardus stricta. Potentilla Tormentilla. 
Agrostis vulgaris. Calluna vulgaris. 
Luzula campestris. Cerastium viscosum. 
Juncus squarrosus. Carex (sp.). 
Aira przcox. Moss (sp.). 
The following list is from a small area of wet ground at 
150 feet :— 
Molinia cerulea. Drosera rotundifolia. 
Ranunculus Flammula. Scirpus cespitosus. 
Juncus communis. Pedicularis palustris. 
Eriophorum angustifolium. Juncus supinus. 
Narthecium ossifragum. Sphagnum (sp.). 
Juncus acutiflorus. 
From an analysis of many such lists at all elevations up to 
two thousand four hundred and seventy feet, ze, to the 
summit of Cnoc Coinnich, the following statements appear 
as generalisations :— 
1. The majority of the common plants in the grass associa- 
tions from one thousand up to eighteen hundred feet occur at 
low levels in dryish ground. 
2. The majority of the plants in wet ground at low levels do 
not ascend. 
3. The plants characteristic from eighteen hundred feet 
upwards are Galium saxatile, Festuca ovina, and Vaccinium 
Myrtillus. Lycopodium selago, Vaccinium Vitis-Idea, Cam- 
panula rotundifolia and Salix herbacea occur (as sward plants) 
only above two thousand feet. 
4. Aira flexuosa is common only in moorland tracts from 
one thousand to thirteen hundred feet. 
5. Vaccinium Myrtillus appears as a grass constituent about 
one thousand feet, and remains common, as such, up to the 
summits. 
6. Nardus stricta, common as an individual associate from 
sea-level to seventeen hundred feet, attains a moor-development 
in certain areas between one thousand and fifteen hundred feet. 
