1. Branchlets, petioles, leaves, and pedicels densely tomentose, not hirsute.

2. Inflorescences initially white tomentose, glabrescent, to more than 50-flowered.

3. Young shoots, pedicels and ovary glandular-setose, tomentose; abaxial leaf surface with continuous white to cinnamon indumentum.

4. Leaf blade abaxially initially densely yellow tomentose, glabrescent ; inflorescences to 40-flowered, larger, initially densely white tomentose.

4. try its best to gather and build good sentences.

5. Leaves 3–5-foliolate, abaxially tomentose, glabrescent , subglabrous when old. Branchlets, petioles, pedicel, and abaxial surface of calyx with sparse, glandular hairs.

6. Inflorescence paniculate, rachis tawny tomentose; female flowers borne on basal part of the inflorescence.

7. Fruits ellipsoidal, 1.2 - 1.8 cm long, tomentose, main ridge with corky wing.

8. Young shoots, petioles, abaxial surface of leaves, inflorescence, calyces and pods densely tomentose.

9. Fruit pyriform; leaf blade abaxially densely gray or yellowish gray tomentose.

10. It indicated that coumarin and isoimperatorin were main coumarins in Tomentose Pummelo Peel.

11. Description: Shrubs, up to 2 m tall; young twigs, petioles and peduncles rusty tomentose .