. Botany of the living plant. Botany. APPENDIX A 531 leaves. Each flower has a slender stalk, and consists of the following parts : Calyx, sepals 4, slightly gamosepalous, inferior. Though the number appears to be four, comparison with other species of Veronica, and with other related plants, such as the Foxglove, shows that a fifth sepal, which should be median and posterior, is here wanting. Corolla, petals apparently four, gamopetalous, inferior, alternating with the sepals and forming a wheel-shaped (rotate) corolla, which readily falls away in one piece. Comparison with related plants sho
. Botany of the living plant. Botany. APPENDIX A 531 leaves. Each flower has a slender stalk, and consists of the following parts : Calyx, sepals 4, slightly gamosepalous, inferior. Though the number appears to be four, comparison with other species of Veronica, and with other related plants, such as the Foxglove, shows that a fifth sepal, which should be median and posterior, is here wanting. Corolla, petals apparently four, gamopetalous, inferior, alternating with the sepals and forming a wheel-shaped (rotate) corolla, which readily falls away in one piece. Comparison with related plants shows that the large. Fic, 437. Flower nf Veronica chimaedrys, typically pentaracrous : but the posterior sepal is aborti\-e : the two obliquely posterior petals are fully fused to form apparently one ; only the two obliquely posterior stamens are developed. posterior petal is really the equivalent of two obliquely posterior petals fused together. In front view the petals are marked by lines, or honey-guides, con- verging to the centre of the flower. Androecium, stamens 2, epipetalous, diverging widely right and left. Com- parison shows that these correspond to the two obliquely posterior stamens, while those obliquely anterior are abortive, as well as the median posterior stamen (Fig. 437). Gynoecium, carpels 2, antero-posterior, syncarpous, superior. The single style projects between the diverging stamens, and bears a capitate stigma. Ovary bilocular, ovules numerous, placentation axile. Fruit, a dry capsule. Pollination. The flower is a specialised and reduced example of the Scro- phulariaceae. The change from a pentamerous to an apparently tetramerous type follows from the abortion of the posterior stamen, which leads to abortion of the posterior sepal and fusion of the two obliquely posterior petals. The obliquely anterior stamens are also abortive, not being necessary for effective. Please note that these images are extracted from scanned page images that may have been digit
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1919
