. Plants and their uses; an introduction to botany . aining ovules. G, a single one of these cavities cut into lengthwise,giving a side view of the ovules, enlarged. //, fruit, with the upperpart of its thick spherical wall removed to show the seeds within,packed about a central spindle. A part of the outer, s»fter layer of thewall is torn away in front, showing the channelled surface of the veryhard inner layer. ./, the central spindle. K, a nut in side view. L, the VARIOUS FOOD-PLANTS 45 same cut across through the middle, to show the thick seed-coat withits thin layers, and the hirge germ w
. Plants and their uses; an introduction to botany . aining ovules. G, a single one of these cavities cut into lengthwise,giving a side view of the ovules, enlarged. //, fruit, with the upperpart of its thick spherical wall removed to show the seeds within,packed about a central spindle. A part of the outer, s»fter layer of thewall is torn away in front, showing the channelled surface of the veryhard inner layer. ./, the central spindle. K, a nut in side view. L, the VARIOUS FOOD-PLANTS 45 same cut across through the middle, to show the thick seed-coat withits thin layers, and the hirge germ which fills it. M, germ, removed,showing the general form and the al)sence of distinguishable parts.(Berg, Humbolt, and Bonpland.)—The plant, which is one of themost majestic trees of the Brazilian forests, reaches a height of over30 m.; leaves bright green; flowers with cream-colored corolla; fruitsnearly as hard and heavy as cannon-balls, fall with tremendous forcefrom the height of 100 feet. . Persons are sometimes killed bythem (Wallace).. im:-: Fig. 33.—Peanut (Ara-chis hypogaa. PulseFamily, Leguiuinosce).A, lower part of aplant showing theleaves and flowersabove ground, andripening nuts androots below; the sur-face of the ground be-ing indicated at eZ. B,a flower cut verticallyto show, at the base,the small ovarj con-taining the ovules,and the long stjleextending through aslender tube which is surmounted by the calyx and corolla and is con-tinued by a tube formed of the united filaments. C, a ripe imt cutlengthwise to show the two seeds. (Tanbert.)—The plant is an annual,i. e., it completes its life from seed to seed in one year; stems and leavessomewhat hairy; flowers orange-yellow, fruit pale. Soon after pollenhas come upon the stigma, the stamens and corolla are shed and theovary is carried out beyond the calyx by a stalk which I)ecomes 5-8 , and, bending downwards, soon buries the little ovary in theground. Once buried the ovary ripens into the familiar p
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
