Pueraria, , van der Maesen, 1985

Jiang, Kai-Wen, Tian, Bin & Pan, Bo, 2022, Legume additions to the flora of China, Phytotaxa 532 (1), pp. 1-21 : 15-16

Key to the Chinese taxa of Pueraria s. str.:

1. Stipules not lobed at base, linear ........................................................................................................................................................2

1. Stipules lobed at base, sagittate ..........................................................................................................................................................7

2. Keels larger than wings ......................................................................................................................................................................3

2. Keels equal to wings...........................................................................................................................................................................6

3. Stems nearly glabrous; stipules caducous; pods glabrous........................................................................................................ P. bella

3. Stems hirsute with yellowish hairs in all parts; stipules persistent; pods hirsute...............................................................................4

4. Bracts shorter than bracteoles; calyx 7–8 mm; standard ca. 8 mm in diam; pods 4–9 cm × 8–13 mm; leaflets usually entire........... ...................................................................................................................................................................... P. montana var. montana

4. Bracts longer than bracteoles; calyx 8–20 mm; standard 10–18 mm in diam; pods 5–14 cm × 8–13 mm; leaflets often 3-lobed ..... ............................................................................................................................................................................................................5

5. Calyx 8–10 mm; standard 10–12 mm in diam; wings subequal to keels; pods 5–9 cm × 8–11 mm ............... P. montana var. lobata

5. Calyx up to 20 mm; standard 16–18 mm in diam; wings slightly shorter than keels; pods 10–14 cm × 10–13 mm .......................... .................................................................................................................................................................... P. montana var. thomsonii

6. Leaflets up to 14.5 × 12 cm, with lateral ones entire; inflorescences up to 17 cm, axis with retrorse hairs; keels not auriculate....... .......................................................................................................................................................................................... P. bouffordii

6. Leaflets up to 8 × 6.5 cm, with lateral ones 3-lobed; inflorescences up to 48 cm, axis without retrorse hairs; keels auriculate at base......................................................................................................................................................................................... P. xyzhui

7. Standard 22–25 mm in diameter.................................................................................................................................... P. grandiflora

7. Standard no more than 20 mm in diameter

8. Bracts longer than flower buds.................................................................................................................................. P. alopecuroides

8. Bracts shorter than flower buds..........................................................................................................................................................9

9. Leaflets suborbicular, entire or irregular 5–7-lobed ........................................................................................................... P. calycina

9. Leaflets ovate, 2- or 3-lobed................................................................................................................................................... P. edulis