104 
REPORT ON BOTANY, MDCCCXLI : 
render them very distinct. Nothing of the kind is seen in the 
liber tissue, and still less in the cells of prosenchyma. The 
proper vessels are likewise of much rarer occurrence in plants 
than the two tissues alluded to. The cellular tissue is per- 
fectly organized, even in the earliest state ; and it is always 
owing to the want of a good microscope, if it does not appear 
organized in the phanerogamia. He has correctly explained 
how the central part developes itself in the woody bundles, 
which he calls, against all the usages of language, “ faisceaux 
parenchymateux hut every thing is not accomplished by 
this alone. If the author asserts, that the root is not different 
from the stem, he must have overlooked the circumstance, 
that the pith is wanting in most roots, or, when it does exist, 
that it wedges itself towards the apex ; and that, on the con- 
trary, the pith increases towards the apex of the trunk. The 
reference to the fibres of the stem, for the representation of 
the position of the leaves, does not appear to me of import- 
ance ; and his idea of the formation of the bud seems quite 
erroneous. With respect to the Monocotyledons, the author 
overlooks the circumstance, that there is not a series of woody 
bundles existing in them, as in the Dicotyledons, and that 
evidently some of them are produced at a later period, which 
alters the matter altogether. 
496 
