On the Comparative Anatomy of the Casu- 
arineae, with special reference to the 
Gnetaceae and Cupuliferae. 
BY 
L. A. BOODLE and W. C. WORSDELL, 
With Plates XV and XVI. 
URING the last half-century the anatomy of Casuarina 
JlJ has been investigated by numerous authors. Some 
of these have restricted their accounts to the description of 
special points, e. g. the formation of periderm, &c., while 
others have given us a more general survey of the whole 
structure. 
Goeppert 1 published a paper in 1841 on the anatomy of 
several species of Casuarina. He gives a fairly accurate 
description of the chief tissues of the woody stem, and was 
the first to point out the peculiar formation of the paren- 
chymatous system, which is so characteristic of this plant, 
and on which he lays especial stress. As was perhaps not 
unnatural, however, having regard to the time at which the 
paper was written, he missed the significance of certain 
peculiarities of the structure, which we shall have occasion to 
refer to in the course of this paper. 
1 Linnaea, 1841 : also Ann. Sci. Nat., Bot., 1842, 2 ser. tome XV 1 IL 
[Annals of Botany, Vol. VIII. No. XXXI. September, 1894.] 
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