igi7] CHAMBERLAIN— LYCOPODIUM 65 



14. Wigglf.sworth, Grace, The young sporophytes of Lycopodium com- 

 planatum and L. davatum. Ann. Botany 21:21 1-234. pi- 22. 1907. 



15. Bruchmann, H., Die Keimung der Sporen und die Entwickelung der 

 Prothallien von Lycopodium davatum, L. annotinum, und L. Sdago. 

 Flora 101:220-267. figs. 35. 1910. 



16. HoiXOWAY, J. E., A comparative study of the anatomy of six New Zealand 

 species of Lycopodium. Trans. New Zealand Inst. 42:356-370. ph. 

 31-34- 1910. 



EXPLANATION OF PLATES II-III 



Fig. 1. — Lycopodium laterale: prothallium with leafy crown at left and 

 bearing, at right, a protocorm with 2 fully grown protophylls and one young 

 protophyll; X20 (fig. ia shows this plant natural size; fig. 16 is sectional view). 



Fig. 2. — L. laterale: prothallium, at right, bearing a protocorm with 2 

 protophylls and also a second embryo; the soil and sand have not been re- 

 moved; X20. 



Fig. 3. — L. laterale: protocorm with 10 protophylls; X6. 



Fig. 4. — L. volubile: prothallium showing primary tubercle at base; the 

 crown is very even; X 10. 



Fig. 5. — L. volubile: prothallium showing crown with numerous arche- 

 gonia and antheridia; primary tubercle at base; X 10. 



Fig. 6. — L. volubile: prothallium with archegonia and antheridia; the 

 crown is lobed; X 10. 



Fig. 7. — L. volubile: large, irregular prothallium; X 10. 



Fig. 8. — L. volubile: prothallium with 2 young sporophytes; X 10. 



Fig. 9. — L. volubile: prothallium with sporeling; a secondary root is 

 shown at r; X4. 



Fig. 10. — L. scariosum: prothallium with sporeling; X4. 



Fig. 11. — L. scariosum: lower part of a young sporeling showing roots 

 and foot; X4. 



Fig. 12. — L. volubile: diagrammatic view of prothallium with foot and 

 lower part of sporeling. 



Fig. 13. — L. volubile: detail of prothallium. 



Fig. 14. — L. volubile: diagrammatic sectional view of prothallium showing 

 archegonia, antheridia, and distribution of fungus, the latter indicated by 

 shading. 



Fig. 15. — L. volubile: portion of prothallium showing antheridia. 



Fig. 16. — L. volubile: transverse section of leaf. 



Fig. 17. — L. scariosum: transverse section of stem of sporeling before the 

 large tracheids become lignified; px, protoxylem; p, phloem. 



Fig. 18. — L. scariosum: same sporeling lower down; large tracheids have 

 become lignified. 



Fig. 19. — L. scariosum: same sporeling showing indication of banded 

 arrangement. 



