182 BOTANICAL GAZETTE 
4. Anatomical evidence favors the isreagee of monocotyledons . 
from dictoyledonous ancestors. 
The subject of this paper was suggested by Dr. E. C. Jeffrey, and 
the investigation has been carried out under his direction and that of 
Dr. J. M. Coulter; to both of these gentlemen I wish to tender my best 
thanks for valuable assistance in the work and in securing material. 
Thanks are also due Miss E. Sargant, of Reigate, England, for material; 
to Professor Ikeno, of Tokio, for seeds of Anemarrhena; and to Sir 
W. T. Thiselton-Dyer, Dr. N. L. Britton, and Dr. W. Trelease for _ 
seeds of various species from the botanical gardens under their — 
direction. 
THE UNIVERSITY OF CHICAGO. 
LITERATURE CITED. 
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Leal 
. 
N 
vascular ends in Asigiobleris evecta and some other Marattiaceae. 
Annals of Bot. 16:371~-402. pls. 16-18. 1902. Biss. . 
3. Gwynne-VaucHan, D. T., On polystely in the genus Primula. Annals 
of Bot. 11:317-325. pl. 14. 1897. - 
4. , Observations on the anatomy of solenostelic ferns. II. Annals oe. | 
Bot. 17:689-742. pls. 33-35. 190 
. JEFFREY, E. C., The morphology of the central cylinder in vascular plants. 
Rep. B. A. A. S. 1897 : 860. 
VL 
6. , The morphology of the central cylinder in the angiosperms. Trans. 
Can. Inst. 6:1-40. pls. 7-II. 1900. 
- , The structure and epdicausecit of the stem in the pteridophytes : 
and mE Phil. Trans. Royal Soc. London 195: 119-146. * : 
I~-6. 1902. ce 
8. » in Coulter and Chamberlain’s Morphology of Angiosperms. 193 a 
9. Queva, C., Contributions 4 l’anatomie des Monocotylédonées. I. Trav. et Ee 
Mém de PUniv. de Lille VII. 22:1-162. pls. I-11. 
I 
Io. Rrwpacu, A., Ueber die Lebensweise des Arum maculatum. Be Deutsch 
Bot. Cosils 15:178-182. pl. 5. 1 
II. SARGANT, E., The origin of the seed leaf j in monocotyledons. New Pah = 
I:107-113. 1902. 
» A theory of tipricin of monocotyledons, founded on the sre 
of their eats Affnals of Bot. 17:1-92. pls. 1-7. 1903- : 
