126 



PHYSIOLOGICAL BOTANY. 



ters, the Great Creator is able to produce all the countless va- 

 rieties of plants which clothe and beautify the earth. 



380. Contents of the cell. Some cells contain air only. 

 Others are filled with solid matter ; but the greater part contain 

 both fluids and solids. There is the cytoblast, a globular atom, 

 earnest of new cells; and protoplasm, the nourishing semi-fluid, 

 both of the same material as the primordial utricle, and with it, 

 and the fluid cell-sap, ever flowing, acting, combining, and pro- 

 ducing either new cells or products like the following : 



480 479 478 477 376 



471 



474 



471, Cells <t, of the pulp of Snow-berry, showing the nucleus; 6, of the parenchyma of the leaf )I 

 I'ink, showing the granules of Ohlorophylle. 472, Cell of a Cactus, soaked in Alcohol, the primon ial 

 utricle separated and contracted. 473, Cell of pleiirenchyma of Pine, dotted. 474, Sketch to illustrate 

 the nature of those di.ts <t, dot seen in front; //, a side view of the same. 475. Traciu-nrhynw. a spirnl 

 cell from the sporange of Equisetum. 476, Spiral vessel of the Melon, single thread; 477, of the Elder, 

 4 threads. 478, Annular duct, distended hy rings instead of a coil. 479. ScaUriform vessels, from O- 

 ninnda (Kern). 480, A dotted duct from (iyranocladus (Coffee-tree). 481, Spiral vessels apparently 

 branched. 482, Branching spirals in the (iourd. 



381. Chlorophyll, the green coloring matter of leaves, con- 

 sists of green corpuscles floating in the colorless sap or attached 

 to the colorless wall. In the Indigo plant these corpuscles arc- 

 blue, and constitute that poisonous drug. But the coloring rnat- 

 t.r which gives to fruits and flowers their bright and varying 

 tints of yellow, red, and blue, is generally dissolved in the cell- 

 sap, which is otherwise colorless. 



382. Starch also originates here, in the form of little striated 

 granules of the same composition as cellulose (C 24 H ao O 20 ). Some 

 twenty such granules appear in the same cell, either loosely or 



