54 ARISAEMA TRIPHYLLUM 
Fic. 26. Longitudinal section of style showing reduced papilla-like hairs, P, 
oi R, raphide 
Fic. 27. Longitudinal section of an ovule having a sterile nucellus, showing the 
changes in the integuments at the time of maturity of embryo-sacs in neighboring 
ovules. pa 
Fic. 28. Bottom of an embryo-sac just after ponjo showing decomposition 
of nucellar tissue, N, and great elongation of tig , 1, of the inner integu- 
ment. X 52. 
Fic. 29. A cross section of an almost mature anther. X 42. 
Fic. 30. sane scree ne of ipp portion of embryo-sac shortly after 
fertilization, sh E, and the shrunken protoplasmic 
Ə R 
lining, L, of the mhal cavity. x RA 
Fic. 31. Longitudinal section of a swollen embryo-sac surrounded by the inner 
integument. A, the egg cell with the nucleus just divided, E, the endosperm, R, 
residual nucleus in the greatly enlarged cavity. X 52. 
Fic Residual nucleus shown in Fic. 31. X 160. 
1G. 33. Longitudinal section of mature ovary, showing the stigmatic hairs at 
outer and inner end of style and the slime, s, in the cavity. X 15. 
PLATE 3 
FIGS. 34-38. Stages in the opening of a plumule leaf. X %. 
IG. 39. A normal first year leaf. X 25. 
Fics. 40-42. Opening of second year leaf. 40, X 4; 41 and 42, X I. 
Fic. 43. A three-lobed first year leaf. X 
Fics. 44, 46, 52. Unfolding of leaves of mature plants. X 14. 
Fic. 47. A plant bearing two flower clusters. X \%. 
Fic. 48. Diagrammatic section of corm, showing terminal bud, B, lateral bud, 
LB, and starch mass, S, to be absorbed during the season. 
Fic. 49. Third year corm. 
Fics. 50, 51. Mature corms nik out of a vertical position by 
1 
+ traction 
Fics. 53, 54. Diagrammatic cross section of leaves in buds of mature plants. 
S, scape. 
PLATE 4 
Fic. 55. A flower spike with almost equal numbers of pistillate and staminate 
flowers. XI 
Fic. 56. à bud dissected out of a 90 g. corm, August X 1. 
Fic. 57. A staminate spike with one pistillate mae. a near the base, and 
probably containing fertilized ovules. X 1. 
Fic. 58. A group of average Aod, 14. 
Fic. 59. A pistillate spike with imperfect staminate flowers on long filame 
at the top. Ý: 
Fic. 60. A staminate spike with scattered pistillate flowers. X TI. 
Fics. 61, 62. Corms at the end of the first growing season. X 1. Most of 
those in FIG. 61 are probably from blind germinations. 
PLATE 5 
Fic. 63. Cross section of root tip just above the calyptrogen. C, root cap 
P, plerome; R, raphide cells. 
