I don't know. I try not to read too far into symbolism; leads to an excess of assumption. And I'm not a fan of assumption.

If my read of art history is correct though, the particular schools of modern art of her time were heavily tilted in favor of studies in form and color, as far as technique is concerned. And given that she cut her teeth during the height of this art epoch, her work is very much in keeping with the ideals of the era.

What makes her work stand out though, in my mind anyway, is that she was heavily in touch with her own sense of self, hence the aforementioned tenacity, such that she was able to translate her passions into a style that, while in keeping with the ideals of her era, was very much distinct from her contemporaries.

So whether not her flowers represent some aspect of Woman-hood relevant to, or perhaps in contrast with, the social mores of her day is not for me to speculate on. What is clear to me is that she knew herself well, in all of her aspects as a creative mind, and that allowed her the confidence to stand out in light of the lower status of a great many women of the age.