Dichotomous Key/Pinales

The order Pinales is composed of Incertae sedis
 * Pinaceae
 * Araucariaceae
 * Podocarpaceae
 * Sciadopityaceae
 * Cupressaceae
 * Cephalotaxaceae
 * Taxaceae
 * Phyllocladaceae
 * †Emporiaceae
 * †Majonicaceae
 * †Ullmanniaceae
 * †Utrechtiaceae
 * †Voltziaceae
 * †Paahake

1: Trees produce cones or arils.
 * 2: Leaves alternate or in fascicles or clusters (not opposite or whorled), needle-like,
 * (scale-like leaves often present on fruiting branches of Taxodium); fruit a cone.
 * 3: Leaves in fascicles of 2-5 leaves or mostly in clusters of many leaves on
 * spur-like branches.
 * 4: Leaves in fascicles of 2-5 leaves, persistent.........................Pinus
 * 4: Leaves mostly in clusters of many leaves on the ends of spur-like branches,
 * deciduous............................................................................Larix
 * 3: Leaves scattered, alternate.
 * 5: Ultimate twigs very slender, greenish and mostly deciduous; leaves deciduous, yellowish-green,
 * much flattened and in two ranks; bark fibrous; cones with several wedge-shaped
 * woody scales......................................................................Taxodium
 * 5: Ultimate twigs not deciduous; leaves persistent, not yellowish-green above;
 * bark not fibrous.
 * 6: Branchlets roughened by the persistent leaf bases; leaves deciduous when dry; cones pendulous, the bracts shorter than the cone scales.
 * 7: Leaves sessile, mostly four-sided, often sharp-pointed................Picea
 * 7: Leaves stalked, flattened, blunt......................................Tsuga
 * 6: Branchlets not roughened by persistent leaf bases.
 * 8: Leaves sessile, flattened, (seldom four-sided); leaf-scars orbicular, not decurrent;
 * cones erect, the scales deciduous.......................................Abies
 * 8: Leaves stalked, flattened; leaf-scars decurrent.
 * 9: Leaves mostly with obtuse tips and with two white lines on the lower surface;
 * cones pendulous, the scales persistent in the axils of long exserted bracts.........Pseudotsuga
 * 9: Leaves with acute tips, yellow-green on the lower surface; "fruit" drupe-like........Taxus
 * 2: Leaves opposite or whorled, often of two kinds, scale-like, awl-shaped, or linear.