. A class-book of botany, designed for colleges, academies, and other seminaries ... Illustrated by a flora of the northern, middle, and western states; particularly of the United States north of the Capitol, lat. 38 3/4. dimensions of the fi-uit. 114. The process of ripening consists of certain chemical changes, effected bythe combined action of heat, light, and air. In its earhest stages, the pericarpconsists of a structure similar to that of leaves, being composed of cellular andligneous tissue, with an epidermis and stomata (35, 37). a. Secondly, the fleshy pulp, or sarcocarp, is developed
. A class-book of botany, designed for colleges, academies, and other seminaries ... Illustrated by a flora of the northern, middle, and western states; particularly of the United States north of the Capitol, lat. 38 3/4. dimensions of the fi-uit. 114. The process of ripening consists of certain chemical changes, effected bythe combined action of heat, light, and air. In its earhest stages, the pericarpconsists of a structure similar to that of leaves, being composed of cellular andligneous tissue, with an epidermis and stomata (35, 37). a. Secondly, the fleshy pulp, or sarcocarp, is developed, and becomes sour byabsorbing from the air an excess of oxygen, which is the proper acidif\-ing prin-ciple. b. Lastly, when the fniit has attained its full growth, the pulp becomes gi-ada-ally sweetened and softened, by the formation of sugar at the expense of theacids and of the ligneous matter, which before rendered it both sour and transitions are exemplified by tlie apple, plum, currant, &c., wlicre thegreater portion of nutritive matter is stored up in the pericaip; but in the fniit of CAPSULE. 03 the oak, chestnut, some of the grasses, &c., it is chiefly or entirely deposited in FIG. 16. — Modes of dehiscence ; 1, ; 2, Seplicidal; 3, Seplifragal. The straightlines represent the dissepiments. 115. Dehiscence. When the pericarp has arrived at maturity,it either remains permanently closed (indehiscent) as the acorn,or it separates into parts forming openings. These parts arecalled valves, and these openings, the dehiscence. Regular de-hiscence is always vertical, and is called, 1. Loculicidal {loculus, a cell, cesdo, to cut), when it takesplace by the opening of the dorsal suture of each carpel directlyinto the cell. Ex. lily. 2. Septicidal {septum, a wall, and ccedo), when it takes placethrough the dissepiments (which are doubled, ^ 85, c). 3. Scptifragal {septum, and frango, to break), when the valvesseparate from the dissepim
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectbotany, bookyear1848
