Hollyhock is a biennial erect herb, the plant type is very high, the highest can reach about two meters, in the stem and branches densely distributed on the bristles, bristles between the small spacing.
Mallow is a biennial or perennial erect herb, much shorter than the former, about 50-90 cm in height, more branched above, sparsely distributed with coarse hairs.
The leaves of hollyhock are relatively large, the shape of the leaves is almost round-heart-shaped, about 6-16 cm in diameter, and the petioles are relatively long, about 5-15 cm in length.The leaves are coarsely pilose above and hirsute below.
The leaves of mallow are relatively small, the shape of the leaves is round heart-shaped or kidney-shaped, the length is about 5-12 cm, the width is about the same as the length, and the length of the petiole is about 4-8 cm.Both sides of the leaf are hairless, and the smooth veins are sparsely distributed with rough short hairs.
The flowering period of hollyhock is from June to August every year, and the flowering period can last from March to April. The flowers of hollyhock are relatively large, and the colors are rich and varied, such as red, pink, yellow, white and so on.
The flowering period of mallow is from May to October, which can last from May to June. The flowering period is longer, the flowers are smaller, and the color is monotonous, only with pinkish purple.