Trees are often found on mountains, however these trees were found "in" mountains - Mint #8 and #5 of my "Mt Chaos" happened to look like trees more than mountains.
Tweaking the code around those parameters resulted in this new fractal tree generator.

Essential code that generates the trees is just:

// Set constants A,B,Q,F,G,XOFF
for(t = 0; t < 8; t+=1/60)
{
a = b = 1;
ITER = 3e4;
with(Math) for(let i = 0; i < ITER; i++)
{
r = 0 | (i < ITER/2? i < ITER*.4 ? 2.5: 3:4) * random();
L=i/ITER
x.fillStyle = HSLA(LEAF-(L**(1-F/2))*(LEAF-TRUNK), 90, 25,.4)
a += B * (r - a + b * sin(a * Q + b) + F + cos(B+A)/4);
b += A * (1 - a * b + cos(a * 3.1 + b + G) - cos(B-A)/7);
X = a * W * 1.5 - W * 1.7;
Y = b * H * 1.35 - H * .4;
Y -= sin(.4*(X/W+XOFF)) * H
X-= W*XOFF
x.fillRect(X, Y, 1, 1);
}
}