Your arrows aren't bad. I'd recommend to shrink the farthest end, so that it can look more 3d, and draw them more flowly, meaning: avoid wobble, and ghost and draw confidently.

Now, one thing you should now is that when you connect your leaves (meaning, the bridge you draw to connect it when it bends), that bridge **must** connect to the spine. That's the role of the spine: be the place where everything connect, even that bridge. So, connect the two leaf sides, and if necessary make it curved it toward the spine. 

Another important issue I am seeing is that when you enclose the leaf, you don't do it where the spine ends, and I repeat: support all your leave on that spine. That's how construction is: you support everything on what already is there. 

Your branches look fine, but in a few, the ellipse and the spine does not fix (the ellipse is a little far of where the spine ends) so keep that in mind.

The first four drawings have texture; although they're demos, they shouldn't include it.

And I repeat the leaf issue: in your drawings, they do not connect with the spine

I think that you could do only two or three demos, not *all* of them. So, in further lessons, remember to do mostly of your own. That's because you need to analize what you are doing.

In your bromelia plant, the leaves are incomplete, and some are cut because other is in front of them. Even if they're coming out of something, always draw they complete; draw always through your forms.

In the potted plant, the branch is like cut, because the pot. As I said before **don't cut just because something is in front of it**. In order to have a good 3d understandment, you should draw through your forms, otherwise it won't be well cimented. And also, remember that if you add more branches, you have to use two existing ellipses, as explained [here](https://drawabox.com/lesson/3/2/forking). Don't just add them like that. And also in the potted plant, you could a somewhat of dirt, to place the branch well.

So, overall, focus on construction, and ciment everything you have on what already exist.