Lankao Paulownia

The main producing areas are in the southwest of Shandong Province and the east of Henan Province, with a vertical distribution of about 1400 meters above sea level. The trunk of Paulownia Lankao is straight and its crown is wide, mostly oval or oblate. The bark is grayish brown. The branches are long. The leaf shape is ovate or broadly ovate. The inflorescence is narrow conical, the flowers are large, the calyx is bell shaped inverted conical, the bell shaped funnel-shaped corolla, and the color is light purple. The capsule is mostly oval in shape, with fine hairs outside and not sticky to hands. Its seeds are small and oval

Paulownia tomentosa

It is distributed in all provinces from the Yellow River basin to the Yangtze River Basin. The main production areas are Shaanxi and Western Henan. The trunk of this variety is mostly low and curved, and the crown is umbrella shaped. Branchlets, leaves, flowers and fruits are mostly hairy. Leaves ovate or broadly ovate. The inflorescence is broadly conical, the flower buds are nearly spherical, the calyx is deeply divided, the Corolla is bell shaped, bright purple or blue purple. Capsule ovoid

White Paulownia

The main production areas are in the provinces south of the Yangtze River Basin. In addition, it is distributed in the Dabie Mountains, Guangdong, Guangxi, Taiwan, Yunnan, Sichuan and other places. The tree energy of this variety reaches 27 meters. Young branches and young leaves are covered with dendritic hairs and glandular hairs. Leaves heart-shaped, long ovate, entire, paniculate cyme, corolla color white or lavender, calyx lobed. The capsule is about 6-10 cm long, oval, and the pericarp is thick

Sichuan Paulownia

It is distributed in Sichuan, Yunnan, Guizhou, Western Hubei and southwestern Hunan. The vertical distribution can reach 1200-3000 meters above sea level. Densely covered with stellate villi, branches and leaf surfaces glabrous. The leaf shape is heart-shaped or broadly ovate, not sticky. Corolla campanulate, mostly white or purple, campanulate calyx, lobes ovate, deeply divided, not reflexed. The capsule is about 4 cm long, oval, and the pericarp is leathery< span>