APPENDIX. 
559 
by him in the Annales des Sciences^ n. s. x. 319. t. 3., from Mar- 
chantia polymorpha, Chara vulgaris, Sphagnum acutifolium, and 
Hypnum triquetrum. 
Page 295. 
M. Payen, in a second memoir upon this subject, names the 
unchanged primitive tissue of plants cellulose^ and says it has the 
same composition as starch ; the matter of lignification he regards 
as the true lignine of chemists. ( Comptes rendus, viii. 52.) 
Page 344. 
The observations by Mr. Griffith on Indian Loranthaceae have 
been continued by M. Decaisne upon the common Mistletoe ; 
and he finds that, although that plant flowers in the months of 
March and April, the ovule does not make its appearance earlier 
than the end of the month of May, or the commencement of June. 
(^Comptes rendus^ viii. 202.) 
Page 347. 
All these statements have now been copiously illustrated by 
excellent figures in Schleiden’s memoir Ueher Bildung des Eichens, 
und Entstehung des Embryos bei den Phanerogamen. 
Page 368. 
There are some secondary forms under which nutritive matter 
is provided for plants, the most important of which is starch. 
The purpose which nature intends this almost universally diffused 
substance to answer, in the system of vegetation, is essentially 
nutritive. It is formed in plants soon after their parts become 
organised, and it collects there till in some instances, such as 
albumen, tubers, rhizomata, and the cellular part of endogenous 
stems, it forms the principal part of the mass. In such cases it is 
ready to be chemically changed at a fitting period, and to become 
the food of the germinating embryo, or of young stems and leaves. 
According to M. Payen, it is enabled to execute this important 
purpose, by virtue of its gradual solution by water and diastase, 
which convert it into dextrine and sugar, and thus render it capable 
of percolating the surrounding tissue, and passing from chamber to 
chamber of parenchyma. {Memoire sur VAmidon^ p. 131.) 
