New icons submitted via web

[bioiconsbot]

submitted by: @ginavong.

[duerrsimon]

Thanks for submitting this illustration @ginavong. I think it could do with some improvements before it reaches the same quality as the other illustrations on the platform. I see for example overlapping lines

Perhaps you can adapt this CC BY SA illustration and match its style. https://commons.wikimedia.org/wiki/File:Leaf_Structure_ms.svg#/media/File:Leaf_Structure.svg