150 ROBERT TRACY JACKSON ON 



shortened, appressed. The branches differ from those of T. occidentalis, Fig. 84, in the angle of divergence, and the 

 appressed leaves are narrower, more acuminate than in the seedling of tliat species. X2. Arnold arboretum, from seed 

 collected at A.shford, Wii.shington. P. 121. 



Fig. 87a. rian of cotyledons c, and fir.st two whorls of nei)ionic leaves 1, 2. P. 121. 



LiBOCEDRnS DECURKENS. 



Fig. 88. Typical seedling, showing cotyledons c, and nepionic leaves which are all primaries. First vfhorl 1 consists of 

 two leaves, second 2 and succeeding whorls all consist of four leaves. X2. Compare Fig. 9, P. 122. P. 121. 



Fig. 89. Older typical seedling, cotyledons and succeeding leaves arranged as in Fig. 88. On branches and top of 

 main stem the leaves beconu! broadened, .sliortened and approach the cliaracler of adult leave.s. X2. Compare Fig. 9, 

 P. 122. P. 121. 



Fig. 89a. Ti]! of braneli of Fig. 89 enlarged sliowing leaves relatively bmad and appre.ssed as compared with jirimary 

 leaves, all in four-leaved whorls X4. P. 122. 



Fig. 90. Character leaves of adult, broader, more appressed, and distally blunter tlian in the young (Fig. 89a), leaves all 

 in whorls of four. From herbarium specimen, Arnold arboretum. X-1. P. 122. 



Fig. 91. Seedling, aljerrant in that the first whorl of nepionic leaves 1, consists of four leaves, which are prdximally 

 fused in two pairs as .sliown enlarged in Fig. 91a. X2. Compare Fig, 11, P. 122. P. 122. 



Fig. 92. Seedling aberrant in tliat tlie primary leaves succeeding the first whorl 1, are in whorls of twos instead of 

 fours as is the normal coiulilion. X2. Compare Fig. 10, P. 122. All Libocedrun decurrens seedlings fi-om Anmld arbo- 

 retum, from seed collecteil in Oregon. P. 12.3. 



Figs. 84-92 drawn by Mr. J. II. Emerton. 



PLATE 23. 



LaTANH COMMERSONir. 



Fig. 93. Leaf of young plant sliowing broadening and distal splitting from mechanical tension. Compare with seed- 

 leaf Fig. 94. X about i. P. 124. 



Fig. 98a. Lower side of leaf Fig. 93, .showing rachis. P. 124. 



Fig. 94. .Seedling showing elongate, lanceolate nepionic leaf witli an elongate racliis. Reduced. P. 124. 



Chrtsalidocarpus hjtescens. 

 Fig. 95. Seedling, leaves 1 and 2, simple, distally deeply cleft; leaf 3 compound, but the distal tip resembles the whole 

 of the simple leaves 1, 2. Reduced. Compare with Figs. 90, 98. P. 120. 



Kentia balmoreaxa. 



Fig. 96. Seedling with seed in place and early nepionic leaf. This leaf is of tlie cleft type; but is distally fused. Com- 

 pare Fig. 98 and leaf 1 of Fig. 95. Reduced. P. 126. 



CaRIOTA CUMINGII. 



Fig. 97. Seedling, early compcjund, pinnate leaf, deeply cleft, the le;xflets distally irregularly truncate. Reduced. P. 

 125. 



Fig. 98. Seedling, simple leaf, younger than Fig. 97, distally very deeply cleft. Compare Fig. 90, and leaf 1, Fig. 96. 

 Reduced. P. 125. 



DiPI-OTnEJIIlTM MARITIMUM. 



Fig. 99. Developing leaf of a young seedling showing adhesion of tlie piniuie by their distal borders. Compare Figs. 96 

 and 101. Reduced. P. 125. 



