Scallion leaves are narrow linear, thick, bright green in color, about 20-30cm long and 2-4mm wide.
The basic leaves of leek are usually several clusters, linear, flat, like leek, about 15-30 cm long, about 6-8 mm wider than the former.
Allium is solitary on the top of the stem. It has a spathe like involucre. The involucre will be brownish red. The flower is white. It often has light red outside, almost no perianth tube.
The flower of leek is also solitary on the top of the stem, with a spathe like involucre, with a light purple red involucre. The flower color is rose red or pink, and the perianth tube is about 1-2.5cm long. Perianth has 6 lobes, which are obovate.
