Conifers make up a large percentage of most Bonsai collections across the world. To me, one of the difficult things with conifers, is to identify the tree to the correct species level. The reason for this could be that my early Bonsai education was on broadleaves and not so much on conifers. Conifers as a large group are identified by the fact that they do not flower, but in the place of this, they produce cones that contain the seeds. This makes them part of the Gymnosperm taxa, along with ginkgo and cycads. These are some of the oldest known plants in nature.

It is not that difficult to identify conifers to genus level, as this can be done mainly on leaf type and shape. Here follows my take on what this looks like (An arrow points to the next table for that category).

Conifers
Cupressaceae Have scale-like or awl-like shaped leaves.	Pinaceae Have needle-like leaves	Taxus Have leaves that are flat and feather-like in arrangement and shape.
Junipers and Thuja	Pines, Spruce, Fir and Douglas fir	Yews

 

Cupressaceae family Leaves are scale-like or awl-like. Fruit is a berry-like cone with scales fused together
Leaves are scale-like or awl-shaped. The foliage is arranged around the branch, rather than flattened and cones are berry-like with scales pressed together. Juniper (Juniperus)	The leaves are small, scale-like and pressed to the stem. The foliage is flattened and plate-like in appearance. The cones are berry-like with thick scales. Thuja (Arborvitae)

 

Pinaceae family Leaves are needle-like
Single needles.  ↓	Needles sheathed at the base in bundles of two to five. Cones have thick scales and are woody with swollen tips. Pine (Pinus)	Short needles in tufts of ten or more and could be deciduous.   Larch (Larix)

Needles are flat in cross-section and quite flexible. ↓

The needles are square in cross-section and quite stiff. Spruce (Picea)

The needles leave an oval leaf scar and the bud tips are pointed. The cones have a three-pronged lobed tongue-like bract that extend out beyond the scales. Douglas Fir (Pseudotsuga menziesii)

The needles leave a round leave-scar and the bud tips are roundish. The cones grow upright on the branch and usually breaks apart before falling off completely. Fir (Abies)

 

 

From here the classification can be further refined to identify the specific conifer to species level. This will come in a future blog.