Lasiobema (Korth.) Miquel, 1855

Peng, Xia, Jiang, Kai-Wen, Xie, Zhi, Gu, Shi-Ran, Wang, Xiang-Ping, Li, Shi-Jin, Shi, Miao-Miao, Tu, Tie-Yao & Zhang, Dian-Xiang, 2024, Rediscovery, amplified description, and taxonomic re-evaluation of Phanera erythropoda var. guangxiensis (Leguminosae, Cercidoideae), Phytotaxa 665 (1), pp. 55-62 : 61

Key to Chinese members of Lasiobema group

As circumscribed by Chen (1988), together with the current study, a total of 14 species of the Lasiobema group have been documented. Here we present an updated key to these species.

1. Leaflet blade with 3 primary veins............................................... P. wuzhengyii (S. S. Larsen) Bandyop., Ghoshal & M. K. Pathak

- Leaflet blade with primary veins 5–13...............................................................................................................................................2

2. Leaflet blade entire; fertile stamens 2 ................................................................................ P. cercidifolia (D. X. Zhang) K. W. Jiang

- Leaflet blade usually ± bilobed at apex, occasionally entire; fertile stamens 3 .................................................................................3

3. Bracts and bracteoles linear, brush-like on young inflorescences......................................................................................................4

- Bracts and bracteoles not brush-like on young inflorescences...........................................................................................................6

4. Ovary puberulent initially, turning glabrous; pedicel 3–4 mm .............................................. P. delavayi (Franch.) Sinou & Bruneau

- Ovary glabrous; pedicel ≥ 8 mm ........................................................................................................................................................5

5. Leaflet blade with apex bifid to only 1/6; petals white, obovate or oblong; staminodes 2 .... P. longistipes (T. C. Chen) K. W. Jiang

- Leaflet blade with apex bifid to more than 1/2; petals yellow or yellowish white, oblanceolate; staminodes 7 ................................. ............................................................................................................................................ P. esquirolii (Gagnep.) Sinou & Bruneau

6. Ovary glabrous .................................................................................................................................... P. scandens (L.) Lour. ex Raf.

- Ovary ± hairy......................................................................................................................................................................................7

7. Ovary hairy throughout ......................................................................................................................................................................8

- Ovary only hairy along sutures or near base ....................................................................................................................................10

8. Leaflet blade bifid to 1/5 at apex; flower buds yellowish green; petals orange-red; anthers yellowish-brown; staminodes 7 ........... ....................................................................................................................................................................... P. macrostachya Benth.

- Leaflet blade bifid to 1/4–1/2; flower buds greyish-green; petals green; anthers white; staminodes 2–3 .........................................9

9. Leaflet blade with a yellowish margin; calyx lobes slightly reflexed .............................................. P. japonica (Maxim.) H. Ohashi

- Leaflet blade not as above; calyx lobes not reflexed............................................................................................................................ .................................................................................. P. guangxiensis (D. X. Zhang & T. C. Chen) X. Peng, K. W. Jiang & T. Y. Tu

10. Pedicel ≥ 7 mm .................................................................................................................................................................................11

- Pedicel 3–6 mm ................................................................................................................................................................................12

11. Inflorescence 1–several corymbose-raceme; petals 7–10 mm ............................ P. apertilobata (Merr. & F. P. Metcalf) K. W. Jiang

- Inflorescence a raceme or several ones compound into a panicle; petals 4–6 mm ............................................ P. championii Benth.

12. Calyx lobes reflexed at anthesis ....................................................................................... P. lingyuenensis (T. C. Chen) K. W. Jiang

- Calyx lobes erect at anthesis.............................................................................................................................................................13

13. Leaflet blade chartaceous, apex bifid to 1/3–1/2, abaxially shiny brownish pubescent when young, grayish pubescent when old; bracts 3–4 mm; bracteoles ca. 1.5 mm ............................................. P. hypoglauca (Tang & F. T. Wang ex T. C. Chen) K. W. Jiang

- Leaflet blade sub-leathery, apex entire, emarginate or shallowly bifid to ≤ 1/6, abaxially subglabrous; bracts ca. 1.8 mm; bracteoles ca. 0.8 mm ............................................................................................................................... P. venustula (T. C. Chen) K. W. Jiang