. Botany of the living plant. Botany. THE FRUIT AND SEED-DISPERSAL 289 Dissemination by Wind and Watkr. Wore frequently the motor impulse is from without, the chief agents being wind, icater or some moving animal. Wind acts directly upon small seeds, such as those of Orchids, scattering them as it would so much dust. It may act less directly where the seeds are larger, and the dehiscent fruit is borne on a stiff stalk, as in the gaping follicles of the Aconite, which, shaken by the wind, scatter their seeds all round the parent (Fig. 227): or in the Poppy (Fig. 231) or Canterbury Bell, which d
. Botany of the living plant. Botany. THE FRUIT AND SEED-DISPERSAL 289 Dissemination by Wind and Watkr. Wore frequently the motor impulse is from without, the chief agents being wind, icater or some moving animal. Wind acts directly upon small seeds, such as those of Orchids, scattering them as it would so much dust. It may act less directly where the seeds are larger, and the dehiscent fruit is borne on a stiff stalk, as in the gaping follicles of the Aconite, which, shaken by the wind, scatter their seeds all round the parent (Fig. 227): or in the Poppy (Fig. 231) or Canterbury Bell, which do the same ; but here the dehiscence is b}' pores, the prin- ciple being that of the Pepper-Box. The wind would no doubt influence the fall of any seeds ; but the development upon them of tufts of hair, or of broad thin wing-like surfaces, enhances its effect upon their transfer, even where the seeds are relatively large. Such developments are sometimes upon the seed itself, as in the case of dehiscent fruits : or they may be ^"^- '3'- ,, , ^. Capsule of Poppy opening by formed by the carpellary walls where the pores below the star-shaped . -4. u 1 ⢠i sUsma. (After Fipiicr.) iruit IS one-seeded, or where it breaks into one-seeded parts. The development of hairs on the seeds themselves is seen in the "Willow and Poplar, in Cotton (Fig. 232), and in the. /(";â - Fig. 23;. Seed of Cotton with superficial hairs. (.Alter Figuier.). 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 Bower, F. O. (Frederick Orpen), 1855-1948. London, Macmillan and co. , limited
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1919
