. Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) Prepared at the request of the Botanical Dept. of Harvard University. Botany; Botany. 104 THE FLOWER ââ stg. ries within it an inlieritance of the racial characteristics: tlie forms (if the leaves, the colors of the flower, tlic height and cliaracter of the stem, even the movements of the parent plant are passed down througli the ovule (with the aid, as will shortly be seen, of the pollen) to the plant which is to spring from the ovule. 189. The ovule-bearing organ is the jjistil (Fig. 132). T
. Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) Prepared at the request of the Botanical Dept. of Harvard University. Botany; Botany. 104 THE FLOWER ââ stg. ries within it an inlieritance of the racial characteristics: tlie forms (if the leaves, the colors of the flower, tlic height and cliaracter of the stem, even the movements of the parent plant are passed down througli the ovule (with the aid, as will shortly be seen, of the pollen) to the plant which is to spring from the ovule. 189. The ovule-bearing organ is the jjistil (Fig. 132). Three parts are usually distinguishable : the hollow lou er portion is the ovarij; the column sur- mounting this is the style; and at the tip of the style â sometimes on its side â a part of the surface without epidermis and moist or even sticky, is termed the stii/ma. The style ma}' be lacking; the stigma is then sessile on the ovary (Fig. 131). 190. Tlie flower commonly contains but one pistil. Such flowers as those of the Pea and illustrate the simplest case of all, wdien the pistil is solitary and has but one cavity with ovules borne on but one side (jf it. In the Buttercup (Fig. 133) there are many pistils, each simple, with a single cavity, cordaining but a single o^â¢ule. In tiie majority of plants, however, the two or more original pistils grow up from a very early stage in their development united throughout the greater part of their length. Compound pistils are thus formed. The several cond)ined carpels. 191. The portion of the ovary to which the ovules are attached is the placenta, and the manner in Mhicli the ovules are distributed on the interior surfaces of the ovary is the placentattoii. AVhen the ovules are numei'ous, the placenta is apt to Ije a ^vell-de\â eloped cushion or projection Pistil of Wild Ge- ranium ; 0^', f)va- ry; stl, style; stg, Please note that these images are extracted from scanned page images that may have been digitall
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