The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . belonging to the vas-cular cryptograms as well as on account of its j^eculiarleaf-whorls. Our figure 126 is photographed from astem which Dr. Th. Weevers found near Nymegen inthe summer of 1900. Here it grew among several otherinstances of torsion in the same species. Casuarina alsosometimes forms such anomalies on its branches; forinstance, several occurred in 1897 in the botanical gardenof Amsterdam (Fig. 127 a). In the first chapter of this part we have seen how,as a result of the correlati

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The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . belonging to the vas-cular cryptograms as well as on account of its j^eculiarleaf-whorls. Our figure 126 is photographed from astem which Dr. Th. Weevers found near Nymegen inthe summer of 1900. Here it grew among several otherinstances of torsion in the same species. Casuarina alsosometimes forms such anomalies on its branches; forinstance, several occurred in 1897 in the botanical gardenof Amsterdam (Fig. 127 a). In the first chapter of this part we have seen how,as a result of the correlati
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The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . belonging to the vas-cular cryptograms as well as on account of its j^eculiarleaf-whorls. Our figure 126 is photographed from astem which Dr. Th. Weevers found near Nymegen inthe summer of 1900. Here it grew among several otherinstances of torsion in the same species. Casuarina alsosometimes forms such anomalies on its branches; forinstance, several occurred in 1897 in the botanical gardenof Amsterdam (Fig. 127 a). In the first chapter of this part we have seen how,as a result of the correlati

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