. On British wild flowers considered in relation to insects. Flowers; Fertilization of plants by insects; Plants. in.] VIOLA. 59 English species in which the showy flowers generally produce seed. The presence of these two totally different kinds of flowers is a very interesting fact; and as the smaller, or as they are called, " cleisto- gamous" flowers are sufficient to reproduce the species, and of course have the advantage of requiring a much less expenditure of material, the. Fio. 57 Fig. 58. Fig. 57 Section of a flower of Viota caninn. Fig. 58.—Stamen of ditto. persistence of the
. On British wild flowers considered in relation to insects. Flowers; Fertilization of plants by insects; Plants. in.] VIOLA. 59 English species in which the showy flowers generally produce seed. The presence of these two totally different kinds of flowers is a very interesting fact; and as the smaller, or as they are called, " cleisto- gamous" flowers are sufficient to reproduce the species, and of course have the advantage of requiring a much less expenditure of material, the. Fio. 57 Fig. 58. Fig. 57 Section of a flower of Viota caninn. Fig. 58.—Stamen of ditto. persistence of the showy ones can only, I think, be accounted for by the fact that the ordinary flowers are useful in securing an occasional cross, as the cleistogamous flowers habitually fertilise themselves. Viola canina. The structure of the coloured flowers is very curious, and has been well described by Sprengel. The petals are five in number, and irregular in form; the median one being produced into a. 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 Lubbock, John, Sir, 1834-1913. London, Macmillan and Co.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectflowers, booksubjectp
