. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Botanique; Botanique. KLKMKNTS OF STRUCTURAL BOTANY. 87. TliG stem is almost suppressed, and, as in the case of the Ilepatica, the loaves are all radical They are also uet-veined. The flowers are raised on scapes, whicli are hollow. At first sight the flower appears to have a calyx of many sepals, and a corolla of many petals. Both of these appearances, however, are contrary to facts. With a sharp knife cut the flo
. The elements of structural botany [microform] : with special reference to the study of Canadian plants, to which is added a selection of examination papers. Plant anatomy; Botany; Botanique; Botanique. KLKMKNTS OF STRUCTURAL BOTANY. 87. TliG stem is almost suppressed, and, as in the case of the Ilepatica, the loaves are all radical They are also uet-veined. The flowers are raised on scapes, whicli are hollow. At first sight the flower appears to have a calyx of many sepals, and a corolla of many petals. Both of these appearances, however, are contrary to facts. With a sharp knife cut the flower through the middle from top to bottom. (Fig. 52.) It will then appear that the flower or rather jloioer-head, is made up of a large number of distinct pieces. With the point of your needle detach one of these pieces. At the lower end of it you have a small body resembling an un- ripe seed. (Fig. 53.) It is, in fact, an ovary. Just above this there is a short bit of stalk, sur- mounted by a circle of silky hairs, and above this a yellow tube with one side greatly prolonged. This yellow tube is a corolla, and a close examina- tion of the extremity of its long side will show pj^, 53. the existence of five minute points, or teeth, from which we infer that the tube is made up of five coher- ent petals. As the corolla is on the ovary it is said to be Epigiinous. Out of the cotolla protrudes the long style, divi- ded at its summit into two stigmas. To discern the stamens wttl require the greatest nicety of observation. Fig. 54 will help you in your task. The stamens are five in number. They are inserted on the tube of the corolla (epipetalous) and their anthers cohere (Fig. 55) and form a ring about the style. When the anthers are united Fig. this way, the stamens are said to be syngenesiom. I. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not p
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, booksubjectpl
