INDEX. 317 



Vegetation: fibro- vascular bundles constituting the wood of trees, i. 173 



the vascular ducts, i. 73 



the pitted tissue, i. 174 



the woody fibre, i. 174 



sclerogen, i. 175 



the laticiferous vessels, or vasa propria, i. 176, 177 

 seeds and spores, i, 177 



cycles of existence in the vegetable world, i. 178, 186 

 variation of marine vegetation, horizontally and vertically with the 



depth, i. 258 



instance of mechanical power exerted by vegetable matter, i. 269 

 seeds brought to Europe by the great Atlantic currents, i. 355 

 gradual changes of structure from the lowest to the highest crypto- 

 gamic forms, i. 375 



reproduction and fructification, i. 376, 377 

 general structure of flowering plants, i. 378 



calyx and corolla, i. 378 



stamens and pollen, i. 379 



pistil, ovary, and style, i. 380 



fructification, i. 381 



monocotyledonous, or endogenous plants, their structure, growth, and 

 reproduction, i. 383 



the earliest dawn of plant life, as shown in the colourless pro- 

 toplasm of the grasses, i. 387 



bulbous plants, structure and mode of reproduction of, i. 388 



orchids, their structure and fructification, i. 389 

 dicotyledonous, or exogenous plants, i. 404-428 



seeds, i. 404 



stems, i. 405 



stomata, i. 405, 406 



bark, i. 406, 407 



cambium, i. 407 



wood, i. 408 



roots, i. 409 



leaves, i. 410 



buds, spines, and hairs, i. 411 



protoplasm, i. 412 



chemical elements of vegetable matter, i. 413 



sap and sap motion, i 415-417 



inhalation and exhalation of oxygen, i. 416, 417 



latex, i. 417 



milk vessels, i. 418 



