STRUCTURE OF LEPIDOSTROBUS. 377 



Lepidostrohus oldhamius (yS). 



Fig. 23. Photograph of transverse section from Williamson's type slide, C.N. 568. m., pith ; x., xylem 

 cylinder; i.e., inner cortex; l.t'., leaf-trace bundles just free from the cylinder; U., leaf- 

 traces in the middle cortical space with xylem at a^. and phloem space at p'. X about .50. 



Plate XXXVIII. 



Lepidostrohus oldhamius (yS) continued. 



Fig. 24. Elements of the xylem. C.N. 1776a. 



Fig. 25. Smaller xylem elements. C.N. 1776 a. 



Fig. 26. Longitudinal section showing the prosenchymatous cells of the outer cortex. C.N. 1776 a. 



Fig. 27. A single cell of the outer cortex, showing striation of the cell-wall. C.N. 1776 a. 



Fig. 28. Longitudinal section passing through the outer cortex and proximal end of a sporophyll. 



o.c, outer cortex ; l.t., leaf -trace bundles ; x., proximal point of attachment of sporangium to 



pedicel; sjo.k;., wall of sporangium. C.N. 1776 a. x about 11. 

 Fig. 29. Longitudinal section of leaf-trace bundle traversing the middle cortex, x., xylem ; i.c.sh., 



inner cortical sheath. C.N. 1776 a. 

 Fig. 30. Part of tangential section of the cone, showing the sporophylls, each supporting a sporangium 



on its upper surface. C.N. 1776 a. x 10. 

 Fig. 31. Transverse section of the pedicel of a sporophyll cut near the axis of the cone, with the 



adjacent sporangia, sp. x., xylem of leaf-trace ; p., phloem space ; i.c.sh., inner cortical 



sheath; c, cortex; Pa., paricbnos space. C.N. 574. x about 35. 

 Fig. 32, Transverse section of the pedicel cut further from the axis of the cone and showing attachment 



to its sporangium, x., xylem ; p., phloem space; i.c.sh., inner cortical sheath; c, cortex; 



Pa., paricbnos space ; 6., parenchymatous tissue passing into the sporangium; sp.w., wall of 



sporangium. C.N. 1776 a. x about 90. 

 Fig. 33. Longitudinal section of the pedicel, x., xylem ; p., phloem ; i.c.sh., inner cortical sheath ; 



Pa., paricbnos space ; c, sclerenchymatous cortex ; b., parenchymatous tissue in the sporangium. 



C.N. 1776 A. X 140. 

 Fig. 34. Longitudinal section at the periphery of the cone, showing the free portion of the sporophylls. 



/,, the ligule ; sp., sporangia and spores. C.N. 1776 a. 

 Fig. 35. Some short tracheides from the expanded portion of the sporophyll. C.N. 1776 c. x about 160. 



Lepidostrohus foliaceus, sp. nov. 



Fig. 36. Nearly radial section of five of the sporophylls and sporangia, p., pedicel of sporophyll ; 



la. J lamina of sporophyll ; sp., sporangium and spores. C.N. 1614. x 9. 

 Fig. 37. Transverse section of pedicel supporting a sporangium, x., xylem of leaf-trace; sc, pads of 



sclerenchyma ; sp.w., wall of sporangium. C.N. 1922 f. x 50. 

 Fig. 38. Part of transverse section of pedicel, x., xylem of bundle (displaced) ; sc, sclerenchyma ; 



sp.w., wall of sporangium. S. 2. X 40. 

 Fig. 39. Transverse section of free portion of sporophyll. x., xylem of bundle ; m.c, one of the cells 



with dense contents, S. 1. x 50. 



SECOND SERIES. — BOTANY, VOL. V. 3 M 



