. 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. because it merges gradually into the scape, which bears the flower, and the petioles of the leaves, which sheathe the scape. The swollen mass is called a bulb. 83. The leaves are two in number, gradually narrowing at the base into sheaths. If you hold one of them up to the light, you will observe that the veins do not, as in the leaves of the Dicotyledonous plants, form a network, but run onl
. 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. because it merges gradually into the scape, which bears the flower, and the petioles of the leaves, which sheathe the scape. The swollen mass is called a bulb. 83. The leaves are two in number, gradually narrowing at the base into sheaths. If you hold one of them up to the light, you will observe that the veins do not, as in the leaves of the Dicotyledonous plants, form a network, but run only in one direction : namely, from end to end of the leaves. Such leaves are consequently called straight-veined. 84. In the flower there is no appearance of a green calyx. There are six yellow Fig. 83. leaves, nearly alike, arranged in two sets, an outer and an inner, of three each. In such cases, we shall speak of the coloured leaves collectively as the peri- anth. If the leaves are free from each other we shall speak of the perianth as polyphi/llous, but if they cohere we shall describe it as gamophyllous. Stripping off the leaves of the perianth, we find six stamens with long upright anthers which open along their outer edges. If the anthers be pulled off", the filaments will be found to terminate in long, sharp points. The pistil (Fig. 83) has its three partsâ ovary, style, and stigmaâwell marked. The stigma is evidently formed by the union of three into one. The ovary, when cut across, is seen to be three-celled (Fig. 84), and is, therefore, syncarpous. Fig. 83.âPistil of Dog'a-tooth Violet. Fig. 84.âCross section of the Fig. 84. 1 . ff m â â h ir :^m 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 perfectly resemble the original Spotton, H. B. (Henry Byron), 1844-1933. Toronto : W. J. Gage
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Keywords: ., book, bookcentury1800, booksubjectbotany, booksubjectplantanatomy
