Gnetum Gnemon, with Notes on Gnehtm funicular e % 53 
DESCRIPTION OF FIGURES IN PLATE I. 
Illustrating Mrs. M. G. Thoday’s paper on Anatomy of the Ovule and Seed in Gnetum Gnemon , 
with Notes on Gnetum funicula re. 
G. Gnemon. 
C - outermost covering ; o = outer integument ; I = inner integument ; N = nucellus. 
Figs, i~6. Series of transverse sections through young ovule. 
Fig. 1. Just below withered apex, showing open tube. 
Fig. 2. Beginning of upwardly directed flange, which is seen on right free from the tube wall, 
but on the left is in continuation with it. / = flange ; p = papillate outgrowth to form flange. 
Fig. 3. Shows the ingrowth of the epidermal cells of the micropylar canal and the proliferated 
outer epidermis of the tube. 
Fig. 4. Section through the base of the widened region of the tube, just about the level of the 
top of the middle covering, x = group of cells projecting from the tip of the middle covering among 
the hairs of the flange. 
Fig. 5. Passes through the middle and inner coverings and shows the lumen of the micropylar 
tube still nearly closed. 
Fig. 6. A little lower ; lumen widened to a triangular cavity. 
Figs. 7- 1 4. Series of transverse sections through large seed. 
Fig. 7. Free apex of micropylar tube with cuticularized lining. 
Fig. 8. Free apex of micropylar tube a little lower down, showing also top of upwardly directed 
flange with corky covering, e — limit between flange and outermost covering. 
Fig. 9. Level of origin of free flange from wall of micropylar tube ; lumen nearly closed. 
e = limit between walls of inner and outer coverings. 
Fig. 10. Micropylar tube quite solid. 
Fig. 11. Section through region in which the wall of the tube is fewer cells thick and cavity 
is filled up with papillate cells. 
Fig. 12. The solid mass of papillae has been torn out, leaving a cavity with a rough surface (g). 
Fig. 13. Section through the base of the downwardly projecting flange ; G is cavity of the 
tube from which the plug of cells has been torn, g — gap in projecting flange, magnified half as 
much as Figs. 7-13. (Between Fig. 13 and the tip of the middle covering the outer covering only 
is cut.) 
Fig. 14. Near the tip of the middle covering, and shows the strongly lignified micr.opylar tube 
surrounded by the middle covering ( 0 ), consisting of a stony inner layer ( st ) and soft outer layer 
( sh ) radially expanded. Magnification as Fig. 13. 
Fig. 15. Apex of young ovule : widely open micropylar canal with heavily cuticularized lining. 
1 = wall of inner covering (micropylar tube) ; o = tip of middle covering (outer integument) ; 
C = outer covering. 
Fig. 16. Apex of rather larger ovule, showing remains of pollen-chamber ( p.c .) and some 
divisions in inner epidermis of micropylar tube. N = nucellus. 
