346 BOTANICAL GAZETTE [NOVEMBER 
robust specimens. There seems to be no reason, therefore, for 
considering the Porto Rican and Cuban plants distinct. 
There is no danger of confusing this very peculiar plant with 
any of our northern species of Odontoschisma. It differs from 
them, not only in its greater robustness, but also in its oblong to 
ligulate leaves with their edges parallel or nearly so except near 
the base. Other differences have already been indicated in 
discussing its relationship with Anomoclada mucosa. 
In the preparation of this paper I have received valuable 
assistance not only from the botanists already mentioned but 
more especially from Professor L. M. Underwood, Professor W. 
G. Farlow, Dr. M. A. Howe, and Mr. W. R. Maxon. Through 
the kindness of these gentlemen I have been allowed access to 
the valuable herbaria under their charge and have also been 
provided with material for study from their private collections. 
YALE UNIVERSITY. 
EXPLANATION OF PLATES XVIII-XX. 
The figures were drawn by the writer and prepared for reproduction by 
Miss Edna L. Hyatt. 
PLATE XVIII, 
Figs. 1-28. Odontoschisma Macounii (Aust.) Underw. 
Fic. 1. Part of a plant bearing a lateral branch with perianth, antical 
view. X 20. 
Fic. 2. Part of s stem, postical view. X 20. 
Fic. 3. Male inflorescence, antical view. X 45. 
Fic. 4. Longitudinal section through female branch and young sporo- 
phyte, showing also the calyptra, two unfertilized archegonia, several slime- 
secreting hairs, the perianth and three perichaetial leaves; somewhat 
diagrammatic. 
1G. 5. Median leaf-cells, surface-view. X 400. 
FIG. . The same, cross-section. x 280. 
Fic, 7. Marginal leaf-cells. x 280. 
Fies. 8, 9. Young underleaves. x 280. 
Figs. 10-12. More mature underleaves. x 280. 
Fie. 13. Cells from margin of a well developed underleaf. x 280. 
Figs. 14-16. Perichaetial bracts and bracteole, innermost row. X 20. 
FIGs. 17-19. The same, second row. X 20. 
FIGs. 20-22. The same, third row. X 20. 
