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The top documents tagged [psilophytawhisk fernsevolved]
K: Plantae Div: Sphenophyta “horsetails or scouring rushes”
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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
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