MISCELLANEOUS. 
103 
for their derivation in the position of the bundles of the stem ; 
he carries this out by contemplating the opposite, whirled and 
alternate, leaves. The buds he distinguishes into terminal buds 
and lateral buds ; the former are only the end of the stem, 
which is connected with the transparent growing zone, and 
consequently can go on developing ; the latter are formed by a 
prolongation of a part of the parenchyma of a median bundle, 
which is carried away by the pressing forward of the leaf-fibre. 
The blossoms he contemplates in the same manner as the 
leaves, and says, that the symmetry of the alternate leaves is 
most frequently that of the parts of the flower, and that five 
parts present themselves in the blossom, as five leaves most 
frequently do in a single turn of a stem. Monocotyledons . — 
The author lays particular stress upon the doctrine, that there 
is no difference between the stem of the Monocotyledons and 
annual plants, the growth of which is limited, in as far as the 
bundles are rounded, and remain isolated ; as the transparent 
part also does not develop itself, but becomes more dense, or 
disappears, so that no separation takes place between the 
central and bark portions. The growth takes place in the 
following manner : — The new fibres are produced from the 
external fibres, and also from those which constitute the denser 
part of the stem ; and further, from those which are situated 
near the pith. The result of the growth, therefore, does not 
occupy any particular zone ; it takes place through the whole 
thickness of the trunk, and is therefore no larger on the out- 
side than on the inside. 
The researches of the author deserve every attention, and 
many points have been illustrated in an admirable manner. 
That the granules, which are situated in the sap, should form 
cells by their union, is a mere hypothesis, which lacks all 
probability. What the author says of the vessels is very cor- 
rect in general ; but it is strange, that he mistakes the liber 
and the prosenchyma for proper vessels. For it is evident, 
from his description of the woody bundles, that he means that 
tissue when he speaks of proper vessels. The latter are dis- 
tinguished by their great diameter ; and although they contain 
no coloured juice, there are yet granules in the juice, which 
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