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LITERATURE CITED 
- Bower, F. O., Studies in the morphology of spore-producing members. II. 
Ophioglossaceae. London. 1806. 
phioglossum simplex. Ann. Botany 18:205-216. pl. 15. 
A CAMPBELL, D. H., The Eusporangiatae. Carnegie Inst. Pub. 140. * Wash: 
ington. 1911. 
JEFFREY, E. C., The gametophyte of Botrychium virginianum. University 
Toronto Studies 1:1-32. pls. 1-4. 1898. 
- Lanc, Wa. H., Studies in the morphology and anatomy of the Ophioglos- 
saceae, I. On the branching of Botrychium Lunaria, with notes on the 
anatomy of young and old rhizomes. Ann. Botany 27:203-242. figs. 14. 
pls. 20-21. 1913. . 
» PRANTL, K., Systematische Ubersicht der Ophioglosseen. Ber. Deutsch. 
Bot. Gesells, 12348-353. 1 
83. 
> reel S., Recherches sur l’Ophioglossum vulgatum L. Oversight. 
K. D. Vidensk. Selsk. 1891: 54-83. figs. 1-17. pls. 1, 2. 
