90 BOTANICAL GAZETTE [avousr 
field sorrel, Rumex Acetosella, in dwarfed-rcsette, very red forn 
the evening primrose, Oenothera biennis; and the moonwort, Bor y- 
chium ternatum intermedium. There are also some forms usually 
characteristic of rather a dry habitat, such as the pearly everlas 
Anaphalis margaritacea, and a western yarrow, Achillea lanulo: 
In addition there are cthers, generally in more sheltered spots al 
also greatly dwarfed, which usually prefer a moister habitat, su 
as the two western roses, Rosa acicularis (R. Sayi, R. Engelmans 
and Rosa lucida; a western viclet, Viola adunca; a stitchwort, Sh 
laria longipes laeta; a silver weed, Potentilla Anserina conc 
the stellate false Solomon’s seal, Smilacina stellata; and on 
the vetches, Vicia Cracca.s The great diversity of natural b 
of these plants, their scanty and irregular occurrence, and 
dwarfed size and rosette-forming tendency all unite to show | 
none of them are here at home. Obviously they are the ones V IC 
of all the many kinds which must be brought to this plain by natural 
modes of dissemination, are sufficiently tolerant physiologic 
be able to germinate under, and then to withstand, these extren 
physical conditions, eking out here a starved and precarious. 
ence. The conditions for germination upon the sand must 
extremely severe, and it is very likely that other kinds of ple 
could exist here as adults, could their seeds develop; and | 
it is probable that the individuals which do exist on the plain 
those whose seeds happened to fall in especially favorable 
or became properly buried by the moving sand. Else why 4 
they so few? The universal dwarfing is due in all likelihood n¢ 
to the heat and dryness of the surface, nor to any salt conteél 
in the soil, and certainly not to a scarcity of soil water, but to 
the paucity of mineral nutrients in the sand. This is in harmony 
with another feature they mostly show in common—very 
and, I think, much-branching roots. The fact that they* com 
5 The following Grande Plaine plants appear to be new to the flora of New B 
wick: Achillea lanulosa, Viola adunca, Rosa acicularis, Stellaria longipes laeta, 
Potentilla Anserina concolor. Certain others are new in name, the species having 
form to the rules of the Vienna Congress, but in these cases the names of Gray’ s Mow 
ual, 6th edition, have been given in brackets 
