K: Plantae Div: Sphenophyta “horsetails or scouring rushes” n Evolved during the Devonian Period (395 mya); one of the dominants during the Caboniferous.
K: Plantae Div: Sphenophyta “horsetails or scouring rushes”
K: Plantae Div: Sphenophyta “horsetails or scouring rushes” n 1. Silica in cell walls. n 2. Leaves microphyllous; small and scalelike; form whorls at nodes.
