. The colours of flowers [microform] : as illustrated in British flora. Flowers; Color of flowers; Flowers; Fleurs; Couleur des fleurs; Fleurs. LA W OF PROGRESSIVE COLO URA TION. 4r Our own beautiful purple English corn-cockle (Z. githagd), is a highly developed campion, so specialised that only butterflies can reach its honey with their long tongues, as the nectaries are situated at the bottom of the tube. Two other species of campion, however, show us interestingly the way in which variations of colour may occur in a retro- grade direction even among highly evolved Fig. 15.—Flower of
. The colours of flowers [microform] : as illustrated in British flora. Flowers; Color of flowers; Flowers; Fleurs; Couleur des fleurs; Fleurs. LA W OF PROGRESSIVE COLO URA TION. 4r Our own beautiful purple English corn-cockle (Z. githagd), is a highly developed campion, so specialised that only butterflies can reach its honey with their long tongues, as the nectaries are situated at the bottom of the tube. Two other species of campion, however, show us interestingly the way in which variations of colour may occur in a retro- grade direction even among highly evolved Fig. 15.—Flower of night campion (^Lychnis vespertina) ; white. One of them, the day lychnis, {L. diiirna), has red, scentless flowers, opening in the morning, and it is chiefly fertilized by diurnal butterflies. But its de- scendant, the night lychnis (Z. vespertina), has taken to fertilization by means of moths ; and as moths can only see white flowers it has become white (Fig. 15), and has acquired a faint perfume as an extra attraction. Still, the change has not yet become fully organised. 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 Allen, Grant, 1848-1899. London : Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectflowers, bookyear1882
