. Complete farmer's guide. Agriculture; Farm life. [from old catalog]. 48 FUNDAMENTALS OF FARMING and thus to fertilize the ovule, so that it can complete the making of the tiny embryo and the storing of the reserve food for the embryo in its seed-case. The falling of the pollen on the stigma is called poUenation (p61-le-na'shiin). If, then, the pollen tube goes down and mixes its contents with the ovule, it is a com- plete fertilization. The low- er end of the pistil in which the seed is formed is called the ovary (o'va-ry). This word comes from the Latin ovum, which means an egg. These ovule
. Complete farmer's guide. Agriculture; Farm life. [from old catalog]. 48 FUNDAMENTALS OF FARMING and thus to fertilize the ovule, so that it can complete the making of the tiny embryo and the storing of the reserve food for the embryo in its seed-case. The falling of the pollen on the stigma is called poUenation (p61-le-na'shiin). If, then, the pollen tube goes down and mixes its contents with the ovule, it is a com- plete fertilization. The low- er end of the pistil in which the seed is formed is called the ovary (o'va-ry). This word comes from the Latin ovum, which means an egg. These ovules, as you see, serve a purpose in plants similar to that served by eggs in animals. The top end of the pistil is called. Fig. 32. The process of fertilization of the ovule by the pollen. Note how the pollen-tube extends down into the ovary and comes into contact with xi ofinmn (^i\(T'mi\\ nnd tViP the ovule. When more than one seed is tllC ^fi^/ma (^Stlg maj, aUQ ine down from a pollen grain for each ovule, a represents the pollen grain; called a stlllc. Some plants h represents the anther of the stamen from which the pollen falls; c repre- haVC UO Stvlc. Ill these, the sents the pollen-tube; rfrepresents the , ."',., » ovulewith several cells in it; e repre- Stlgma IS dircctly OU top 01 sents the ovary; / represents the ,, rr<i x i*i corolla; and g represents the calyx. the OVary. ihc StameU like- wise has distinct parts. On the top is the little box that holds the pollen, called the anther (an'ther). Below this is the slender supporting stem called the filament (fira-ment). These stamens and pistils in dif- ferent plants are of all sorts of shapes and sizes, and in vary- ing numbers, just as the calyxes and corollas of different plants vary in many different ways. All that is necessary to produce a seed is that there be a stamen that develops. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
Size: 1633px × 1529px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
