Ultramarine, Sap green, Madder lake (or alizarin)
Paper: Needs to be ROUGH/ TORCHON. Arches rough is great for this. If you use a smooth paper you won't get the jagged edges of the branch.
Pigment in the brush: not too much water and make sure you stroke on the paint use your brush almost horizontally for best results
Draw an elongated cone shape
with a centre line.
Draw irregular ellipses over-lapping
draw outside your cone but don't
deviate too far from the original line.
You can see here the ellipses are
This is brush stroke 1. Start with the
brush on the line of the cone and
sweep out, feathering the edge
This is brush stroke 2. Squash your
brush as shown and sweep down from
brush stroke 1
Start with a few squiggles with a fine
brush at the top. Change to bigger brush and
Add darker colour (green + madder)
to give the shadows under the branches
then add the trunk continue up adding