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(4) Leaves spatulate, sub-oval, or linear; obtuse; meshes of me- 
dium breadth. 
1. G. Browniana, Brong. 
(2) Leaves lanceolate, or linear, acute, or acuminate. 
(a) Meshes very narrow, elongate, not as a rule markedly broader 
on the borders of the midrib thanin therest of the lamina. 
Frond large, elongate-lanceolate or oval-lanceolate. 
2. G. indica, Schimper. 
Frond of medium size, narrow, linear. 
3. G. angustifolia, Brong. 
(b) Meshes very narrow, elongate, except oneither side of tha 
midrib, where they are comparatively broad and polygonal. 
Frond large, lanceolate. 
4, G. stricta, Bunb. 
(3) Leaves large, broadly obovate, obtuse, or emarginate, midrib 
thick, nerves very close and subparallel, and meshes narrow, except 
near the midrib. 2 
5. G. ampla, Dana. 
Il. Type of Glossopteris retifera. Meshes very broad, midrib 
persistent. 
Frond of medium size, lanceolate or oval-lanceolate. Meshes 
not much longer than broad. 
6. G. retifera, Feist. 
Frond fairly large, spatulate or oval-lanceolate. Meshes elon- 
gate-polygonal, much longer than broad. 
7. G. conspicua. Teist. 
Frond linear. Meshes broad, oblong-polygonal. 
8. G. formosa. Feist. 
Il. Type of Glossopteris tortuosa. Lateral nerves sinuate, or 
tortuous. 
Frond fairly narrow. Meshes on either side of the midrib large, 
broadly polygonal, the succeeding meshes narrower, elongate-polygonal 
or trapezoidal. 
9. G. tortuosa, Zeiller. 
Frond fairly broad. Meshes broad, irregular, of nearly equal size 
throughout the lamina and very elongate. 
