PLATE 32 



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00 



193 





195 



190. Dendrobium findlayanum. Transverse section of root, showing narrow velamen and small vascular cylinder. 



191. Dendrobium nobile. The same, showing wide velan-.en and wide vascular cylinder. 



192. Dendrobium cybele. The same, showing velamen and vascular cylinder in width between the two parents. 



193. Dendrobium findlayanum. Transverse section of leaf midway between apex and base, showing deep ridges, 



large lower epidermal cells and large bundle. 



194. Dendrobium nohile. The same, showing slightly larger ridges, large lower epidermal cells, and slightly smaller 



bundle. 



195. Dendrobium cybele. The same, showing faint ridges, smaller epidermal cells, and smaller bundle than in either 



parent. 



