VOLUME LVII NUMBER 3 
THE 
BOTANICAL GAAZETTE 
MARCH 19174 
THE ANATOMY OF OPHIOGLOSSUM PENDULUM 
CONTRIBUTIONS FROM THE HULL BOTANICAL LABORATORY 183 
LOREN C. Perey 
(WITH SIXTEEN FIGURES) 
The section OPHIODERMA of the genus Ophioglossum, as first 
separated by PRrAnttL (6), is distinguished from EUoPHIOGLOSSUM 
y the numerous vascular strands in the base of the petiole, and 
from CHEIROGLOsSA, which shares this feature, by the occurrence 
of a single spike on each fertile leaf. As originally described, the 
section was composed of the single species O. pendulum L.; O. 
intermedium Hook. was considered to be a young form of O. pendu- 
lum, and was included with that species. In 1904, BOWER (2) 
described the new species O. simplex Ridley, from Sumatra, and 
from an examination of its vascular system showed that it is a 
member of this section. He further reestablished the species O. 
intermedium Hook. on the basis of its intermediate position between 
O. pendulum and O. simplex. 
Of the three species constituting the section, O. pendulum is 
best known. Bower (1) has described the development of the 
fertile spike and sporangia, and in a later paper (2) has given a 
brief account of its anatomy. This paper deals merely with the 
vascular system of the leaf and its insertion upon that of the stem. 
The investigation here described has been undertaken with a view 
to supplementing this account of the anatomy of the species. 
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