Sketchplanations

Explaining one thing a week in a sketch

Identify a douglas fir: showing a douglas fir cone with it's 3 pointed mini-leaves named Dougie, Douglas and Doug

Identify a Douglas fir

How to identify a douglas fir? I find identifying the sometimes subtle differences of tall evergreens rather difficult, but fortunately, that's not the case for the douglas fir.

Identifying a douglas fir, a tall, straight and very impressive evergreen conifer is easy with this simple reminder if you find any cones. Normally, the cones are easy to find around the base of a tree. For such a large tree, like the redwood or sequoia, the cones are quite small.

Douglas fir cones have many small 3-pointed tongues (or bracts) that emerge from the tight cones. Typically, they are of unequal lengths with the longest in the centre. After it came to mind to name each one Dougie, Douglas, and Doug, in turn, after the length of each point, I haven’t forgotten since and identifying a douglas fir is easy.

Mature douglas firs typically have grey, tough and deeply-fissured bark to go with it.

The douglas fir, one of my favourite trees, might even have grown above the tallest redwoods living today making the douglas fir one of the tallest known trees.

The Douglas fir is named after Scottish botanist David Douglas and is not a true fir tree and so it's sometimes written Douglas-fir.

Also see: Ponderosa pine fire protections, nurse log, phoenix trees

Keep exploring

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Sonic Boom illustration: a series of increasingly fast planes flying in the sky is shown from left to right, along with their position in relation to the sound shockwaves produced as the air in front of each plane is compressed. The plane on the left travels slower than the speed of sound and is thus behind its shockwaves. In the middle, the aircraft travels at the speed of sound and the shockwaves are shown bunching up near the nose of the plane. On the right, the supersonic, speedy aircraft surpasses the speed of sound creating a loud boom to the delight and / or fright of those on the ground nearby.
Ponderosa pine and its bark listing out some of the fire protections it has
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