. Notes on the life history of British flowering plants. Botany; Plant ecology. 130 BRITISH FLOWERING PLANTS the house and placed them on my billiard-table. They were thrown from one end completely beyond the other, in some cases more than twenty feet. The mechanism by which this is effected has been described by Leclerc du Sablon.^ He suggests that the fibres forming the rods are thicker and therefore contract more on the outer side, thus throwing the rods into a state of tension, so that eventually they burst away. In some Geraniums the seeds are reticulate, and in others they are smooth. Th
. Notes on the life history of British flowering plants. Botany; Plant ecology. 130 BRITISH FLOWERING PLANTS the house and placed them on my billiard-table. They were thrown from one end completely beyond the other, in some cases more than twenty feet. The mechanism by which this is effected has been described by Leclerc du Sablon.^ He suggests that the fibres forming the rods are thicker and therefore contract more on the outer side, thus throwing the rods into a state of tension, so that eventually they burst away. In some Geraniums the seeds are reticulate, and in others they are smooth. This seems to me to be con- nected, with their relation to the carpel. This is shown in the following table :— 0. sylvaticum pratense rotundifolium columbinum 0. JRobertianum „ lucidum „ phceum „ molle „ pusillutn In Erodium Carpels not detached, hairy, not reticulate. Seeds thrown and reticulate. Carpels thrown, reticulate. Seeds smooth. also, the seeds remain in the carpel, and are practically smooth, the reticulations, if present, being very small. In the seedlings the. Fig. 76.—Section through em- bryo of Geranium, show- ing the mode of folding of the cotyledons. two "halves" of each coty- ledon are unequal. This is due to the manner in which the cotyledons are folded. In the Cabbage and Mustard we have seen that 1 Ann. Sci. Nat. ser. 6, xviii. (1884). Fig. 75.—Seedling of Geranium sanguineum. Nat. 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, New York, Macmillan and Co. , Ltd.
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