Pay close attention to details like petal texture, vein patterns, and how light and shadow fall on the flower. Using a range of shading techniques and carefully observing the flower's unique characteristics will add realism to your drawing.

Techniques like contour drawing for outlines, stippling for texture and hatching or cross-hatching for shading work well. Styles can range from hyper-realistic to abstract. Experiment with different techniques to find what works best for you and the specific flower you're drawing.

Avoid oversimplifying the flower's structure, which can make it look unnatural. Also, be careful not to ignore the proportions and scale of different parts of the flower. Overusing uniform shading can flatten your drawing, so aim for varied tones to create depth.