1907] Fernald,— Soil Preferences of Alpine Plants 169 
Of the species which abound on Mt. Washington, Katahdin, or 
Table-top (Group I) and on the tableland of Mt. Albert (Group ITD) 
as well, but are unknown on the coastal cliffs of Gaspé and in other 
areas with an essentially identical flora (Group IT) there are 32 (12.4 
per cent.), of which the following are noteworthy. 
Lycopodium Selago, var. appressum. Loiseleuria procumbens, 
ewes canescens. ee angustifolia. 
rigida, var. Bigelowii. ifolia. 
Juncus trifidus. Phyllodoce caerulea. 
Betula glandulosa. Andromeda glaucophylla. 
Silene acaulis. Veeoune 
Rubus arcticus. canadense. 
Empetrum nigrum, . Vitis-Idaea, var. minus, 
Ledum groenlandicum. Diapensia lapponica. 
Rhododendron lapponicum. Prenanthes trifoliolata, var. nana. 
Twelve other plants (4.6 per cent.) unknown from the tableland 
of Mt. Albert (Group III) are common to districts included in Groups 
Tand II; 11 species (4.3 per cent.) are common to Groups Ia and II, 
but are unknown from Groups I and III; 4 (1.5 per cent.) are common 
to Groups [Land III; and 2 only (0.8 per cent.), absent from areas of 
Group I proper, are known from Groups Ia, II and HI. 
Twelve species (4.65 per cent.) are common to all the areas. These 
noteworthy plants are all familiar species: 
Larix laricina. Luzula parviflora. 
Picea mariana. Rubus triflorus. 
“canadensis. Potentilla tridentata. 
Abies balsamea. Castilleja pallida, var. septentriona- 
Agrostis borealis is. 
Carex brunnescens. Viburnum pauciflorum. 
“  seirpoidea. 
It is apparent from this analysis of our alpine floras that, of the 258 
plants here enumerated, 185 species and varieties (65 + 5 + 94 + 21) 
or 71.65 per cent. are closely restricted in their occurrence south of the 
St. Lawrence each to only one of the groups of mountains, cliffs, and 
alpine areas above tabulated; 61 (12 + 11 + 32+ 4+ 2) or 23.7 
per cent. are known from two of the primary groups but not the third; 
and only 12 or 4.65 per cent. are found on all three groups of mountains 
and cliffs. Obviously, with less than 5 per cent. of our alpine and 
subalpine plants showing an inclination to grow upon all our mountain 
areas, but with more than 95 per cent. of the species showing a decided 
preference either for one group of alpine areas or for two of the groups 
