On the Structure of the Stem of 
Angiopteris evecta. 
BY 
R. F. SHOVE, 
Girton College, Cambridge. 
With Plates XXVIII and XXIX. 
Introduction. 
HE Eusporangiate Ferns of the present day arouse 
JL particular interest, in that they are the living repre¬ 
sentatives of old Fern types only known to us in the fossil 
state. Any further knowledge of the structure of these Ferns 
is therefore of much importance to the palaeobotanist, and 
particularly is this so in the case of the Marattiaceae, once 
widespread and abundant, though now only represented by 
a few genera. 
These considerations led to the following account of the 
anatomy of Angiopteris evecta , Hoffm., which is the result of 
work on a large stem brought from Ceylon by Mr. Pearson, 
of Kew, and generously placed at the disposal of Mr. Seward 
for investigation. In the examination of the roots some of 
the material used was obtained from the Cambridge Botanic 
Garden. 
The account deals mainly with the anatomy of the stem, 
together with a few points of interest in the structure of the 
root. The arrangement and structure of the vascular tissue 
[Annals of Botany, Vol. XIV. No. LV. September, 1900.] 
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