(2) Tubular corolla. Corolla is mostly cylindrical, such as bisexual flowers in the center of the head of most compositae plants.
(3) bell-shaped corolla. Corolla tube is wide and slightly shorter, and the upper part is bell-shaped, such as platycodon grandiflorum.
(4) Cross corolla. There are 4 petals, which are cross-shaped in pairs, so are the corollas of Cruciferae plants.
(5) Lip corolla. A closed flower, symmetrical left and right, with two lobes, namely, upper lip and lower lip, such as labiatae.
(6) Lingual corolla. The corolla is in a short tube at the base, and its upper face is flat and tongue-shaped in Zhang Kaicheng, such as the flower head of Compositae, with a round of tongue-shaped flowers on the edge.
(7) Butterfly corolla. The five petals have three forms, the top one is called the flag petal, the two smaller ones with symmetrical sides are called the wing petals, and the lower two are called the keel petals, such as leguminous plants.
(8) Radial corolla. Corolla tube is short, and lobes radiate from the base to the periphery, which looks like a wheel, such as Fu Lu Kao.