loo 



31. Embryo just before appearance of cotyledons. X 610. 



32. Embiyo after appearance of cotlyedons; (Pie) plerome, (Per) peril)leni. 



X 125. 



33. Base of embryo of about the same stage as Fig. 32 showing plerome, 



periblem and relation of embryo to suspensor. X 010. 



34. Young ovule of anatropous type. X 125. 



35. Ovule at time of fertilization, campy lotroi)ons type; (N. ,T.) nutritive 



jacket. X 125. 

 3fi. Ovule a short time after fertilization, showing the curvature of the 

 embryo sac and the extensive development of the nutritive jacket. 

 X 125. 



37. Later stage, embryo i~ac much curved, with mass of endosperm in 



chalazal region. X 75. 



38. Nutritive jacket, same stage as Fig. 35. X 010. 



39. Nutritive jacket, same stage as Fig. 30. micropylar region. X 610. 



40. Nutritive jacket, same stage as Fig. 30, chalazal region. X 610. 



41. Mass of endosperm serving as an haustorium in chalazal region of 



embryo sac. Same stage as Fig. 37. X 010. 



42. Section in region of the funiculus in the plane of the mass of 



tracheid-like cells; (T) tracheid-like cells, (V) raphe, (c) columnar 

 cells of seed coat. The section is in the plane indicated by the 

 line a'b'; Fig. 43 X 345. 



43. Saiue as Fig. 42 but slightly earlier and in a plane perpendicular to 



it as indicated by the line ab, (T) tracheid-like cells, (C) columnar 

 cells of seed coat, (C) columnar cells of funiculus, (E) paren- 

 chyma of funiculus in path of food supply. X 610. 

 44-50. Distribution of starch in ovule. Amount of starch is indicated by 

 the thickness of stippling. 



44. At about Ihe megaspoi'e stage. 345. 



45. At the time when the embryo sac begins to enlarge. X 345. 



46. At the time of fertilization. X 125. 



47. Soon after fertilization. X 125. 



48. At a considerably later stage. X 125. 



49. In embryo just before formation of cotyledons. X 75. 



50. In ovule and embryo at a much later stage; (C) columnar cells of 



seed coat, (V) raphe, (T) tracheid-like cells, (P) reserve proteid. 

 X 75. 



