


1901 | THE LIFE HISTORY OF ERYTHRONIUM 385 
Fic. 14. Longitudinal section of style showing glandular cells. B. & L. 
#Z. 18 
Fic. 15. Microspore of &. Americanum, December 1. L. +y Z. 4 
Fic. 16. Pollen grain of £. Americanum, April 15; anilin-safranin picro- 
‘nigrosin. L. +g Z 
Fig. 17. Pollen grain; anilin-safranin gentian-violet. L. ~g Z. 4. 
Fig 18. Pollen grain; anilin-safranin gentian-violet. L. +5 Z. 4 
Fig. 19. Pollen grain on stigma with short pollen tube; aniJin-safranin 
gentian-violet. B.& L. 7; Z4 
Fig. 20. Pollen tube in the style canal showing plugs of dark-staining 
material. B. & L. yy L.8 
Fig. 21. Tip of pollen tube. B. & L. py L. 8. 
Fig. 22. Young ovule of &. Americanum with archesporial cell, October 
ee BLT 
Fig. 23. Young ovule of E. Americanum with archesporial cell, Decem- 
ber 1. Flemming’s triple stain. Z. 8 Z. 18 
Fic. 24. Young ovule of £. Americanum with archesporial cell developed 
directly into a megaspore, December 1; network ees to form the con- 
tinuous spirem; anilin-safranin gentian-violet. L. Wy Z. 12 
Fig. 25. Megaspore nucleus in April; continuous spirem and pale-stain- 
ing nucleolus; anilin-safranin gentian-violet. L. 
Fig. 25 a. Another section of the sa 
FIG. 26. Megaspore nucleus in tebe mother skein stage; anilin-safranin 
gentian-violet. L. yy Z 
* Fig. 27, Megaspore showing effect of contraction ; 
ing; anilin-safranin gentian violet. L. 5 Z. 
Fic. 28. Megaspore nucleus at close of clbee mother skein stage. 

may be due to freez- 
L. +6 
Fie G. 29. Megaspore showing twelve chromosomes after disappearance of 
nuclear membrane, L. + Z. 4. 
1G. 30. Megaspore spindle with peculiar poles; anilin-safranin gentian- 
violet, iron-haematoxylin. L. v5 L. 8. 
Fig. 31. Megaspore spindle with one pole cut away and a centrosome at 
the other; the other pole was in the following section; anilin- safranin gen- 
tian-violet, iron haematoxylin. L. +g Z. 12. 
Fig. 32. Megaspore spindle cut 8 1 thick; distinct centrospheres at the 
poles ; anilin-safranin gentian-violet. 
Fig. 32 a. The following section of the same mone showing multipolar 
spindle because of longitudinal sectioning. 
FIG. 33. Megaspore; multipolar spindle produced by diagonal cut; sev- 
eral of the chromosomes disturbed by the knife and some in following sec- 
tion; anilin-safranin gentian-violet, iron- -haematoxylin. L. yy Z. 6 
Fig. 34. Another multipolar spindle produced by diagonal cut; one set 
