20 BOTANICAL GAZETTE [JANUARY 
magnifications in diameters were approximately as follows: figs. I-22, 120; 
23-42, 850; 43-66, 670; 67, 2300; 68, 69, 670; 70-74, 850; 75, 380; 76, 
77, 850; 78-82, 600; 83, 30 ; 
The abbreviations employed in describing figures are as follows: a, air 
cavity; av, archesporium, a/, antipodals; ¢, egg; ev, endosperm nucleus; BF 
flower; g, generative cell; m, male cell; 0, ovule; Z, petal; fo, polar; pi, 
pollen tube; s, sepal; sg, synergid; svc, spore mother-cells; sf, sperm; spi, 
spathe; sz, stem; ség, stigma; stm, stamen; 7¢, tube nucleus; 7v, vesicular 
cell; w, primary wall cell. 
PLATE I. 
Fic. 1. Early stage in the development of pistillate flower. Flower seen 
at side of stem, 
Fic. 2. Flower grown out, nearly equaling stem tip in length. Spathe 
pushing out at base of flower. 
Fic. 3. Stem tip resuming original direction. Receptacle flattens. 
Figs. 4-6. Stages immediately preceding development of the floral tube. 
Calyx showing at margin of receptacle. 
IGS. 7-9. Early development of floral tube. Sterile stamens next to 
calyx. 
FiG. 10. Stigmas and ovules developing simultaneously. 
Fic. 11. Later stage showing beginning of corolla. 
Fig. 12. Pistillate flower with principal parts all established, and floral 
tube entering upon period of more rapid elongation. 
Figs. 13-16. Early stages of staminate flower 
Fic. 17. Outer stamens showing next to calyx. 
Fics. 18-20. Development of stamens. 
FiG, 21. Corolla growing up between calyx and outer stamens. 
Fic, 22. Later stage in development of staminate flower. 
PLATE I, 
Fic. 23. Early stage in development of ovule, showing ectres postal cell. 
FIG. 24. Primary sporogenous cell and two parietal cells. 
FG. 25. Division of primary sporogenous cell. 
Fics, 26, 27. Division of daughter c 
Fic. 28. Ovule with six megaspores. The two central cells of the row of 
four have each divided, making six in all. 
megaspores developing. 
IG. 29. Row of four megaspores. The deeper-lying one is developing 
and others are being crowded out. 
1G. 30. Two-celled embryo sac, showing early development of antipodal 
The innermost and outermost 
pouc 
Fic. 31. Division of these nuclei. 
Fic. 32. Establishment of 8-celled embryo sac. 
«33. Ob 
FIG er embryo sac showing arrangement of cells. Polars 
approaching one another. 
