240 FISHER: SEED DEVELOPMENT IN PEPEROMIA 
Fic. 15. An embryo showing four cells in longitudinal section; endosperm 
several-celled. 65. 
1G. 16. Longitudinal section of mature embryo and endosperm. X 300. 
Fic. 17. Longitudinal section of a mature fruit showing how far it is sunk in 
the axis. X 50. 
1G. 18. Hydathode and hair from a transverse section of peduncle of spike. 
Fics. 19-27. Peperomia verticillata 
Fic. 19. Transverse section of pollen-sac showing tapetum and tetrads of 
microspores. XX 670. 
Fic. 20. Longitudinal section of ovule showing primary archesporial cell; the 
gee just started. X 465. 
Fic, Longitudinal section of an embryo sac containing sixteen free nuclei. 
X 670. 
Fic. 22. Longitudinal section of young carpel containing a lobed ovule. X 220 
Fic. 23. Longitudinal section of lobed ovule, older stage than sateatbinge: 
Fic. 24. Lateral exterior view of a reconstruction of a lobed ovule. X 80 
Fic. 25. Median longitudinal section of the preceding, showing integument and 
aloe: sac of the fertile lobe. X 
Fic. 26. Transverse section pe a : bbe ovule, showing position of embryo sac 
in otiali fertile lobe. XX 220. 
Fic. 27. Longitudinal section of a deformed seed developed from a lobed ovule 
(somewhat diagrammatic). 
Fics. 28-34. Peperomia scandens 
Fic. 28. Nearly longitudinal section of a two-nucleate embryo sac, showing the 
cell-plate, which is the beginning of the evanescent cell-wall. 670. 
Fic. 29. Transverse section of two-nucleate embryo sac showing evanescent 
cell-all X 670. 
Fics. 30, 31. Longitudinal sections of two-nucleate embryo-sacs showing evan= 
escent cell-walls. 
Fic. 32. Longitudinal section of a young carpel showing how far it is sunk in 
the axis. 50. 
Fic. 33. Longitudinal section of a mature fruit, showing how far it is sunk in 
the axis. 0. 
gitudinal section of the upper part of an embryo sac, showing the 
egg and iar Poo synergid. X 670. 
Fic. 35. Peperomia metallica 
Fic. 35. Lateral view of an interrupted flower-spike, showing zone of small 
vegetative leaves. 2, 
Fic. 36. Peperomia blanda 
PE A 1 re 4 On 3 1 ‘ 1 1 : eaecent 
Fic. 36. g 
cell-wall. X 670. 
