. Elementary principles of agriculture; a text book for the common schools. iar examples, we shall find that ithas several parts, each of which contributes some serviceto the success of the plants effort to form seed. Wehave already learned that a seed is usually an embryoplant, with a store of reserve food, both inclosed in aprotecting case called the seed coat. 165. The Names of the Parts. We must learn the partsof a flower and their names. We first notice the brightlycolored petals. They attract our attention and that ofthe bee also. The bee long ago learned to recognize (lU) 112 Elementary
. Elementary principles of agriculture; a text book for the common schools. iar examples, we shall find that ithas several parts, each of which contributes some serviceto the success of the plants effort to form seed. Wehave already learned that a seed is usually an embryoplant, with a store of reserve food, both inclosed in aprotecting case called the seed coat. 165. The Names of the Parts. We must learn the partsof a flower and their names. We first notice the brightlycolored petals. They attract our attention and that ofthe bee also. The bee long ago learned to recognize (lU) 112 Elementary Principles of Agriculture these brightly colored parts as sign-boards directingit to the nectar below. The pleasant scent or odorserves the same purpose. 166. There are five petals in the peach-blossom, allseparate, but in the morning-glory they are united or separate, taken together they aretermed corolla. (Fig. 53 ) Just below the corolla there areusually five small green leaves which are named sepals,and, when taken together, the calyx. The corolla and. Peach-blossom, cut open, to show the parts of Calyx and corolla of Morn- the flower. ing-Glory. Fig. 53. Peach-blossom and morning-glory. calyx were called the floral envelope by the older botan-ists. Inside of the corolla are a number of small yellow-ish masses on slender stalks. These yellowish bodies arecalled pollen cases, or anthers. When ripe, they producethe fine yellow dust, or pollen. In the center of the whorlof stamens is the pistil. There are three parts in thepistil. At the top it usually has a slightly knob-likeportion called the stigma, covered with a thick, gummyliquid. The stigma is sticky, to catch and germinate thepollen brought from its own or other flowers. Belowthe stigma is a slender portion, the style, and then theswollen base, the ovary. The ovary is the part that The Office of Flowers 113
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