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how can I distinguish gai lan , choi sam and mustard greens from their appearance? show me images.

Based on appearance, here is how you can distinguish between Gai Lan, Choi Sam, and Mustard Greens, followed by their images.

Green	Appearance (Key Distinguishing Features)
Gai Lan (Chinese Broccoli)	Has thick, crisp-tender stalks (the thickest of the three, resembling broccoli stems) and wide, flat, dark-green, glossy leaves. Often harvested with small, unopened flower buds.
Choi Sam (Chinese Flowering Cabbage)	Characterized by long, thin, pale green stems and oblong, dark-green leaves. It is typically sold with edible small yellow flowers on top, which is its most distinct visual trait.
Mustard Greens (Gai Choy)	Distinguished by its large, broad leaves that have a frilly, ruffled, or crinkled texture. The leaves are usually a yellowish-green color and look like a cabbage that hasn't formed a tight head.

Based on appearance, here is how you can distinguish between Gai Lan, Choi Sam, and Mustard Greens, followed by their images.

Green	Appearance (Key Distinguishing Features)
Gai Lan (Chinese Broccoli)	Has thick, crisp-tender stalks (the thickest of the three, often resembling broccoli stems) and wide, flat, dark-green, glossy leaves. It is often sold with small, unopened flower buds.
Choi Sam (Chinese Flowering Cabbage)	Characterized by long, thin, pale green stems and oblong, dark-green leaves. Its most distinct visual trait is the presence of edible small yellow flowers on top.
Mustard Greens (Gai Choy)	Distinguished by its large, broad leaves that have a frilly, ruffled, or crinkled texture. The color is typically a yellowish-green.