. Aspects of plant life; with special reference to the British flora. Plants. 58 PLANT MIGRATION out through the open side. In the Cranesbills the jerk is so violent that seeds may be flung to a distance of twenty feet. One of the most efficient of all devices of this kind is found in the Sand-box Tree (Hura crepitans), a native of South America. By sudden rupture and twisting of the carpels of the woody sub- globular fruit, the large seeds of this plant are thrown. o -Fruit of Geranium. a, Mature; h, ditto, with pouches raised ready to discharge nuts ; c, in act of discharging. to a distance
. Aspects of plant life; with special reference to the British flora. Plants. 58 PLANT MIGRATION out through the open side. In the Cranesbills the jerk is so violent that seeds may be flung to a distance of twenty feet. One of the most efficient of all devices of this kind is found in the Sand-box Tree (Hura crepitans), a native of South America. By sudden rupture and twisting of the carpels of the woody sub- globular fruit, the large seeds of this plant are thrown. o -Fruit of Geranium. a, Mature; h, ditto, with pouches raised ready to discharge nuts ; c, in act of discharging. to a distance of thirty yards, the explosion being accompanied by a report like that of a pistol-shot. In the common Dog Violet (Viola Riviniana) (Fig. lo) the fruit is a three-valved capsule, which on ripening divides; each valve assumes a horizontal position and its edges contract till it is shaped like an open boat, the seeds lying in a row down the middle. The sides as they dry close in tighter and tighter on the 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 Praeger, R. Lloyd (Robert Lloyd), 1865-1953. London, Society for Promoting Christian Knowledge
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectplants, bookyear1921
