Hi Robert, Your drawing of this petal is very nice. I can tell that you are very carefully observing the edges of the petal. And I like how you are using contour lines to help with the 3D form. I think you still need to get some more values in there (without considering color at all). I’m really only seeing midtones (except for the white area). This makes it difficult to show form. You want to try to get those 9 values in. A grisaille layer first can really help with this. I took your petal, and put it into photoshop to add a grisialle layer (which would have gone down on the paper first), to try to show you what I mean. Hope it helps!
it’s a rough example, but can you see how getting those darks on the right, and keeping your highlight very light helps to show that 3D form?