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I. W. BAILEY 
Fig. 39. Juniperus virginiana L. Nucleus from fusiform initial seen in tangential, 
longitudinal extension. X 850. 
Fig. 40. Sassafras officinale Nees et Eberm. Nucleus from fusiform initial, showing 
halos about nucleoli. Tangential, longitudinal extension. X 850. 
Fig. 41. Pinus Strohus. Nucleus from fusiform initial, showing early prophase and 
nucleoli. Tangential, longitudinal extension. X 850. 
Fig. 42. Cedrus lihani Barrel. Nucleus from fusiform initial, showing nucleoli. 
Tangential, longitudinal extension. X 850. 
Fig. 43. Pinus Strohus. Aggregating nucleolar masses. X 2000. 
Fig. 44. Same. Vacuolated nucleoli. X 2000. 
Plate XXIX 
Fig. 45. Sequoia sempervirens Endl. Cytokinesis in fusiform initial which is dividing 
to form callus. X 850. 
Fig. 46. Same. Later stage than that of figure 45. X 850. 
Fig. 47. Rohinia Pseudo- Acacia. Tangential, longitudinal section of cambium, 
showing ray and fusiform initials. X no. 
Fig. 48. Pinus Strohus. Cytokinesis in transversely dividing, fusiform initial. 
Tangential, longitudinal extension. X 850. 
Fig. 49. Sequoia sempervirens. Cytokinesis in transversely dividing fusiform initial. 
Tangential, longitudinal extension. X 850. 
Fig. 50. Pinus Strohus. Transverse section of cambium and adjoining xylem and 
phloem. X no. 
Fig. 51. Sequoia sempervirens. Cytokinesis in obliquely dividing fusiform initial. 
Tangential, longitudinal extension. X 500. 
Fig. 52. Same. Cytokinesis; daughter nuclei have migrated to opposite sides of 
cell. X 500. 
Fig. 53. Pinus Strohus. Tangential, longitudinal section of cambium, showing two 
types of initials. X no. 
Fig. 54. Same. Cytokinesis in derivative cell of cambium, showing curvature of 
cell plate. X 500. 
Fig. 55. Same. Cytokinesis in obliquely dividing fusiform initial, seen in tangential, 
longitudinal extension. X 500. 
Fig. 56. Same. Halo or "cell within cell" stage of cytokinesis in longitudinally 
dividing fusiform initial, seen in tangential, longitudinal extension. X 500. 
Fig. 57. Same. Later stage than that shown in figure 56. X 500. 
Fig. 58. Same. Later stage than that of figure 57, showing kinoplasmasomes. 
X 500- 
