. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. io6 ANGIOSPERMAE—DICOTYLEDONES 74. Lunaria L. Large violet homogamous flowers, devoid of odour, and with concealed nectar. 250. L. annua L. (=L. biennis Mnch.). (Knuth, ' Bloemenbiol. Bijdragen,' and Bot. Centralbl., Cassel, Ixx, 1897, pp. 339-40.)—The flower mechanism closely resembles that of Matthiola incana, but the corolla-tube is only 10 mm. long, so that the nectar is accessible to comparatively short-tongued insects. The calyx is deeply cordate at th
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. io6 ANGIOSPERMAE—DICOTYLEDONES 74. Lunaria L. Large violet homogamous flowers, devoid of odour, and with concealed nectar. 250. L. annua L. (=L. biennis Mnch.). (Knuth, ' Bloemenbiol. Bijdragen,' and Bot. Centralbl., Cassel, Ixx, 1897, pp. 339-40.)—The flower mechanism closely resembles that of Matthiola incana, but the corolla-tube is only 10 mm. long, so that the nectar is accessible to comparatively short-tongued insects. The calyx is deeply cordate at the base, and the sepals are closely apposed, so as to hold the claws of the violet petals together to form a tube. The anthers of the four long stamens project half-way out of the entrance of the flower, turning their closely-juxtaposed pollen-covered sides inwards. Self-pollination may, therefore, take place automatically by the fall of the pollen, or may be eff'ected by insect-visits. The two short stamens arch outwards at their bases, thus leaving room for the nectaries lying internal to them, as well as for the secretion. The anthers of the two short stamens—like those of the long ones—mature simultaneously with the stigma, and turn their dehisced. 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 Knuth, Paul, 1854-1899; Knuth, Paul, 1854-1899; Mu?ller, Hermann, 1829-1883; Ainsworth Davis, J. R. (James Richard), 1861-1934. Oxford : Clarendon Press
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