1054. But besides the air, the _light_ also operates upon the plant and stimulates it to grow aloft and produce a light-organ. This light-organ can thus originate only upon the apex or summit. It is the _flower_. The flower can therefore stand nowhere else than on the summit or end of the plant. The light however acts upon many points of the upper surface of the vegetable trunk and elongates the same. One plant can therefore support numerous flowers, but all of these must stand upon an extremity. Wherever therefore a flower may happen to stand, that spot must be regarded as a summit or end. There is thus also, according to the physiological view of the matter, a _light-organ_ in the plant, which is its animal pre-affection. The chief antagonism in the plant is in this respect therefore between trunk and inflorescence the former is related to the latter as plant to animal. Were the plant to attain unto animal functions; they could thus only take place in the flower. I. _Tissues._ 1055. The tissues are the unseparated organs of the three fundamental processes, the earth-, water-, and air-process. 1. WATER-ORGAN, CELLULAR TISSUE. 1056. If a mucus-vesicle lie upon the ground, it thus continues indifferent upon the lower or dark side, and is only affected by the gravity and the water; the upper side, on the contrary, by the differencing air and light. It is consequently prolonged into the earth and into the air. It must pass over from the round into a linear form. The elongation is not a mere protraction of the vesicle, but an apposition of new vesicles. For it happens through polarization, and thus by infinite repetition of the primary vesicle. The plant is thus a body of infinitely numerous vesicles. 1057. In so far as the plant is a multiplication of the primary vesicle, it consists of _Cellular tissue_. The anatomy of plants informs us, that there is nothing _originally_ in the plant but cellular tissue, and that other forms first emerge or make their appearance in the sequel. 1058. The cellular tissue indicates the Indifferent in the plant, for it is only an accumulation of the indifferent primary vesicles. In so far as the plant consists thereof, is it indifference--water-plant. 1059. The cellular tissue is only oxydized, desiccated mucus. Chemistry has proved, that the wood is only oxydized mucus. 1060. The cellular tissue being the water organized and saturated with earth, or the organized mucus, has consequently the chemical function in itself of solution, homogeneous production, or formation of mucus. As therefore the plant originates, so does it enlarge. It originates as vesicle, and its growth is a constant origination of vesicles; from the Indifferent, which is the water. The sap contained in the cells consists of water and starch-granules, which constantly circulate therein in a circle.