Hello LOADSOFSKEPTIC, I hope you are well.

Starting with arrows.

They flow nicely, you are making them smaller as they go into a distance, you are overlapping your edges so that's a good point, but you are repeating your lines way too much times here. You pointed that you struggle with lineweight, I do agree that adding lineweight to curves is definitely hard, but it is possible with enough practice and we are doing exercises here so the final outcome doesn't matter, https://imgur.com/OHvr7Mb diagram on lineweight.

Moving onto your leaves.

You are building them from simple forms then adding details, which is a correct process. You are folding them in a natural way. Nothing major to point out here, but in your 2/3 nd/rd leaf(the one that has 16 leaves) you put way too many of them, while drawing small we tend to skip construction and just focus on detail, drawing big is definitely better practice. Good job on those leaves either way.

Moving onto the branches.

They came out pretty good, but most of them are just cylinders and not branches. Also when you are drawing the lines for them always remember https://d15v304a6xpq4b.cloudfront.net/lesson_images/18463269.png, I am pointing that out because some of your branches look awkward with your lines.

Lastly your plants themself.

In partridge pea drawing, you went definitely overboard with details there, you sacrificed form for details in the leaves on the right. Also if you are adding shadow, add it to the whole drawing, it will definitely make it more 3d to the viewer.

Something that I am noticing is that the degree of your ellipses isnt as consistent as I would wish it to be and it is appearing throughout your whole lesson. It is expected from a beginner, so nothing to worry about for now. Understanding ellipses really helps you build your masses in 3d space and reinforce your drawings. You are required to understand it in the 250 cylinder challenge.

Also when drawing that plant https://imgur.com/a/MXkNvaR remember to fully draw the contour during those exercises. Just a tiny nitpick, since we are constructing here.

Lastly, on your last page, you draw too many of them on a single page, 2 is a maximum that I would recommend, since past that number you are forced to draw small, and drawing small is just awkward for your shoulder. There is a lot of empty blank space on your pages, so use your whole page while drawing exercises.

In conclusion, you did a really good job, there are few minor mistakes, like the degree of ellipses that I would love if you addressed it during your warmups, but past that I will mark this lesson as complete. Good job.