424 
Fig. 
Fig. 
DR. OTTO STAPF ON THE 
11. Fertilized ovary with palea and rhachilla continuation, side view : pa.— palea ; 7A. — rhachilla. 
(4 x.) 
12. Lower part of a fertilized pistil in longitudinal section: 74. =rhachilla continuation ; pa. = palea ; 
fil.— filament; 0.=ovule ; es. — embryo-sac (indicated by the dotted hne). (16x .) 
13. Fertilized ovary in cross-section (spirit-material) : vr.— ventral ridge, opposite the palea; 
oc.=ovarial cavity ; o.— vule; es.=embryo-sac. (27 X.) 
14. Fertilized ovule (from fig. 13), more magnified : oc.=ovarial cavity ; ow.=ovary-wall, outer 
layers (*) staining yellow with Schultz’s solution, inner layers (**) staining blue; es.= 
embryo-sac. (200 x.) 
15. Fertilized ovary in cross-section from herbarium material, microtome section, made by 
Mr. Boodle: letters as in fig. 13. (27 x.) 
16. Barren fruit, in longitudinal section, at a right angle to the median plane: es.=embryo-sac ; 
e 
d.=diaphragm ; oc.*— marking indicating the position of the obliterated ovarial cavity. (,%).) 
17. The same, in cross-section : fig. as in 16. (in, 
18. Another barren fruit, in longitudinal section in the median plane: oc.*=obliterated ovarial 
cavity ; ao.— apex of ovule; es.—embryo-sae. (j^) 
19. Lower portion of ovule (from fig. 18) : letters as in fig. 18. (4 x.) 
20. Part of the cross-section represented in fig. 17: p.=pericarp; oc.* —obliterated ovarial cavity, 
filled with a structureless mass; end. = endosperm, almost collapsed ; ow.=ovary-wall. (27 x.) 
21. Part of the same, more magnified : letters as in fig. 20. (160 x.) 
22. Lower part of a semi-mature fruit: p.— pericarp, at * spongy aud collapsing ; es.=embryo-sac ; 
end.—endosperm, at ** stretching across the cavity, indicating the level at which the 
embryo formed originally; the apex of the ovule has quite disappeared : e.= embryo. (3x.) 
. Embryo of the fruit represented in fig. 22: co.=coleoptile with a bud (5.) in its axil, its base 
covered on one side by the projecting rim of the scutellum (sc.), on the other by the 
radicle (r.) ; sr. = secondary root initial. (16 x.) 
wo 
oo 
PLATE 46. 
24. Epidermis and collenchyma of the pericarp: chl.=chloroplasts ; am.=starch, (400 x.) 
25. Epidermis (surface view) with stoma: silicified guard-cells. (400 x .) 
26. Epidermis treated with Eau de Javelle and embedded in clove-oil: only the silicified cells are 
visible. (400 x.) 
27. Parenchyma from the middle of the pericarp, before germination ; the contents of one cell only 
are shown : amc.— compound starch-grains ; ams.=simple starch-grains. (400 x .) 
28. Parenchyma from the middle of the pericarp, germination advanced ; cell-walls partly dissolved 
and corroded. (400 x.) 
29. Innermost part of the pericarp, diaphragm, and outer part of the scutellum : p. pericarp ; 
d.-- diaphragm ; sc.=scutellum; epth.=epithelium ; am.-— starch. (400 x .) 
30. Outer part of the diaphragm (obliterated endosperm), expanded. (400 x .) 
31. Portions of the inner cells of the diaphragm, expanded, from a semi-mature fruit with transitory 
starch. (400x .) 
_ 32. One of the crushed inner cells of the diaphragm, imperfectly expanded. (400x .) 
.. $3. Vascular strand of the scutellum, in cross-section : ca. —cambiform ; tr.=tracheids. (x 400.) 
2 34, Vascular strand of the scutellum, near the surface 
scnl , somewhat obliquely cut: letters as 
-in fig. 33. (400 x .) 
P 35. Parenchyma from the centre of the scutellum : am. = starch; pi.=pits. (400x .) 
DEE 
