The litters of coniferous trees accounted for 90% in artificial forests, but litters of broadleaf trees were 40% in natural forests.
Over a carpet of full-bodied coniferous trees, the jagged spine draws closer until we're looking at it vertically, finally using the glass dome to its full potential.
Recent scientific studies indicate the probable existence of several resin producing coniferous trees that may account for the variations seen in the colour of amber.
The pine and fir are coniferous trees.
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