Friction

Along the rod it would be red, if there was a mass on the rod and you were considering the friction acting on the mass by the rod. This is because the (hypothetical) mass wants to slide down the bar.

But the ground friction pushes horizontally on the end of the bar. There is also the vertical ground reaction at that point. The rod end would slide horizontally left without friction. Friction must push horizontally right.

Hm ok so basically if there was a mass anywhere on the rod, the friction would act up the rod /red one and no mass means horizontal so green one

When a surface exerts friction it always acts along (tangential to) the surface.

So the friction between the ground and the rod will always be horizontal. If you had a brick resting on the rod, then friction between the brick and the rod would act in the direction of the rod, but the friction between the rod and the ground would remain horizontal.

[And just in case you're wondering why we couldn't flip the roles of rod and ground to say that the friction exerted by the rod on the ground acts along the surface of the rod, the difference is that the contact between rod and ground doesn't involve the *surface* of the rod - just the end. So the contact point on the rod doesn't have a clearly defined "direction"].