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ROYAL SOCIETY OF CANADA 
ILLUSTRATIONS. 
PLATES I-VI. 
1.—Rhizome of Osmundites skidegatensis, x */;. 
2.—Osmundites skidegatensis. Sectional view showing (1. tr.) leaf traces. 
xo. 
Sis) altace coun . .. .. .. A portion of the stele, showing (1) pith, 
(2) the horseshoe-shaped xylem bundles enclosing starch-bearing 
extensions of the pith, (3) medullary rays, (4) the phloem, (5) 
starch-bearing parenchyma external to the stele. x 20. 
LS Seer ere .. .. «. .. . Section showing (1) the outer face of the 
eee © a medullary ray at the point of emergence and junc- 
tion with the inner phloem, (3) the ‘sieve tissue showing the 
wedge-shaped expansion, (4) the elongated cells of the outer 
phloem. x 200. 
Bead eo .. .. .- Tangential section showing (1) scalari- 
forth ements of the xylem, (2) thin-walled elements of the inner 
phloem containing nuclei. x 200. 
6... s)he be Ge se ws eee --. Transverse section of the xylemiyx7200: 
TN. re De.  - Lransverse section showings @) dthervelon— 
gated cells of the outer phloem, (2) the absence of a definite 
endodermal layer, (8) the cells of the parenchyma zone-bearing 
starch. x 200. 
8.—.. . + os ss 02 aves so mection of a leaf tracey showing  paren- 
ce ser containing starch. x 55. 
9.—Osmunda regalis. View of a rhizome from the underside, show- 
ing the overlapping stipes and the upward enlargement of the 
Dase x 
10 3. ae ee eet ee Section through the xylem: 32200) 
11.—.. .. .. .. .. .. .. Section showing (mr.) the medullary ray and its 
junction with the inner phloem, (x.) the xylem, (ph.*) the inner 
phloem, (s.c) sieve cells with the wedge-shaped expansion of the 
tissue opposite the ray, (ph.*) the outer phloem, (en.) the endo- 
dermis, (pr.) the outer zone of parenchyma with prominent nuclei 
and starch. x 183. 
12.—Todea barbara. Section showing (x.) the xylem, (mr.) a medullary 
ray at its junction with the inner phloem, (s.c.) sieve cells show- 
ing their radial expansion into a wedge-shaped mass opposite 
the ray, (ph.) inner and outer phloem, the latter showing. much 
elongated cells, (pr.) the Outer zone of parenchyma. x 183. 
