499 
COLLECTIONS AND RECOLLECTIONS. 
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grow, and may be potted off or planted out in the spring. In this 
way, one hundred plants may he preserved in a single pot in a 
window.— Irish Farmers and Gardeners Magazine. 
Geography of Plants _It is found convenient to divide the 
surface of the earth into different stations, when treating of Botanical 
Geography. The arrangements and distinctions of M. de Candolle 
are as follows 
1. Maritime or Saline Plants : that is to sa}g those which, with¬ 
out being plunged in salt water, and floating on its surface, are ne¬ 
vertheless constrained to live in the vicinity of salt water, for the sake 
of absorbing what may be required for their nourishment. Among 
these, it is requisite to distinguish those which, like the Salicornia, 
grow in salt marshes, when they absorb saline principles, both by 
their leaves and roots, from those which,like the RoccellaFuciformis, 
exist upon rocks exposed to the sea air, and appear to absorb by 
their leaves only: and, finally, a third class, such as Eryngium Cam- 
pestre, which do not require salt water, but which live on the sea- 
coast, as well as elsewhere, because their constitution is so robust, 
that they are not affected by the action of salt. 
2. Marine Plants, also called Phalassiophytes, by M. Lamouroue, 
which live either plunged in salt water, or floating on ils surface. 
3. Aquatic Plants, living plunged in fresh water, either entirely 
immerged, as Confervoe ; or floating on its surface, as Stratiotes; or 
fixed in the soil by their roots, with the foliage in the water, as several 
kinds of Potamogeton ; or rooted in the soil, and either floating on 
the surface, as Nymphoea; or rising above it, as Alisma Plantago. 
4* Plants of Fresh-water Marshes, and of very wet places, among 
which it is chiefly necessary to distinguish those of bogs, of marshy 
meadows, and of the banks of running streams ; and, finally, those of 
places inundated in winter, but more or less dried up during the 
summer. 
5. Plants of Meadows and Pastures, in the study of which, it is 
requisite to distinguish those that by their natural or artificial asso¬ 
ciation form the turf of the meadow, and those others which grow 
mixed together with the greatest facility. 
6. Plants of cultivated Soil. This class has been entirely pro¬ 
duced by the agency of man ; the plants which grow in cultivated 
lands are those which, in a wild state, preferred light substantial 
soils. Many have been transported from one country to another, 
with the seeds of other cultivated plants. 
7. The Plants of Rocks. These pass, by insensible gradations, to 
those of walls, rocky and stony places, and even of gravel ; and the 
M m 3 
