Hi TonyGotCakes,

This is well done, good job! I have a few things that I would like to point out.

For your arrows, be weary about where you put your hatching lines, as you always want them to to remain on one side of the arrow while fully conveying the arrow turning in space. One of the arrows in the middle (https://imgur.com/a/kd6e2al) has some hatching that looks like it's on the outer side of the arrow but doesn't fully cover that side when it turns in space. The hatching stops before it is able to completely reach the arrow's edge (the one that signifies a turn), which does not sell the idea of the arrow turning in space as well as if all of your hatching was to reach that edge.

Your leaves are well done. If you ever do this exercise again, I suggest that you try to explore leaves with more varied silhouettes, because, from what I see, you have a good understanding about what you are doing. Just be sure to differentiate from the middle of the leaf form and the leaf's flow line as much as you can (if the flow line doesn't represent the middle of the leaf). In leaf 3, one of the veins looks like it is connecting to the leaf's flow line, making it a little confusing visually as to where the middle of the leaf is. The flow line itself doesn't touch the line that bridges the sides of the leaf together, making identifying where the middle of the leaf is a little difficult. If it helps, you can think of the leaf's form separate from the flow line entirely, just to envision where the middle of the leaf would lie.

Your branch/tube forms rotate and sit in space well. Again, if you every do this exercise again in the future, I'd say to play around more with forms that twist and turn more in space, with their ellipses having their degrees being widened and lowered at a more noticeable rate.

Your plant constructions were clearly done with a lot of thought nad understanding about how they are constructed, which is good. I would say to watch out how many times you go over your spheres that you draw, especially in the 3rd plant. A lot of the segmented branches have spheres that look like they're drawn 3-4 times over.

I understand that you got tired by the 8th construction (which is entirely understandable), but if you were ever to do something like the Trachyandra Tortillis (the plant with a lot of twisting forms), I'd suggest to add some cast shadows to make it even more clearer about which forms overlap others. Your highlighted lines serve well, but having some cast shadows (even smaller ones) would make the construction a lot clearer.

Good luck with future endeavors!