A coniferous tree is a type of tree that produces cones and has needle-like leaves. The four crossword solutions for this term are PINE (4 letters), SPRUCE (6 letters), FIR (3 letters), and LARCH (5 letters). PINE trees are evergreen conifers with long needles and woody cones, while SPRUCE trees are also evergreen conifers with short needles and woody cones. FIR trees are also evergreen conifers with flat needles and woody cones. Lastly, LARCH trees are deciduous conifers with flat needles and woody cones.