EXPLANATION OF THE ILLUSTRATIONS 
Plate I. Botryopteris globosa Darrah. The figure at the top shows 
the broken surface of a mass of sporangia in longitudinal view. The 
plane is not median, but beyond the main axis. The branching which 
appears in this view is that of a secondary petiole. Near the left of 
the upper right quadrant of the sporangial mass is a cluster of spo¬ 
rangia grouped around a short pedicel. Natural size. Heliotype re¬ 
production of a photograph of specimen number 42159 (Cotype), 
Paleobotanical Collection of the Botanical Museum. 
The figure at the bottom shows a transverse view of a fructification, 
sawn at a right angle to the main axis. The axis (“petiole”) is located 
slightly below the center of the illustration. In this specimen it is 
surrounded by crystalline calcite which appears as a white region in 
the figure. 
Specimen number 42159. Natural size. 
Plate II. Botryopteris globosa Darrah. Heliotype reproduction of a 
photograph of a cellulose nitrate peel prepared from the surface of 
the specimen illustrated at the bottom of Plate I. The stele of the 
petiole shows the departure of a branch. The * shape of the xylem 
of the stele is evident at the bottom of the illustration. Magnified 
Plate III. Botryopteris globosa Darrah. Vertical (longitudinal) sec¬ 
tion through the main axis bearing the sporangial mass. The plane 
of the section is tangential to the axis, i.e. all of the tissue shown in 
the petiole is cortical. At the top left a secondary branch shows several 
pedicels, which are surrounded by sporangia. A similar cluster is 
shown at the bottom right. Twenty times natural size. 
Reproduced from a photograph of a cellulose nitrate peel from 
specimen number 42159. 
Plat * IV. Botryopteris globosa Darrah. Several sporangia, filled 
w ith spores. Reproduced from a photograph of a cellulose peel taken 
from specimen number 42159. Fifty times natural size. 
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