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| 1 |
Stamens 10, filaments connate at base, irregularly separated to incompletely 3-5-adelphous on upper part; leaflets (7 or)9(or 11-13), ovate to ovate-lanceolate, 1.5-4 × 0.8-1.6 cm. |
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28 D. polyadelpha |
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Stamens 9 or 10, monadelphous or diadelphous |
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(2) |
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| 2 (1) |
Stamens 10, diadelphous (5+5) |
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(3) |
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Stamens 9, occasionally 10, monadelphous |
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(8) |
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| 3 (2) |
Leaflets numerous (13-21); stipules large, leaflike, ovate-lanceolate or falcate-lanceolate; inflorescence densely brown villous, pubescent, or silky pubescent |
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(4) |
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Leaflets fewer (7-17); stipules small, not leaflike; inflorescence sparsely puberulent |
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(6) |
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| 4 (3) |
Legume 2.5-5 × 0.6-1 cm; leaflets abaxially densely pubescent. |
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25 D. sericea |
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Legume 5-11 × 1.2-3.2 cm; leaflets sparsely appressed puberulent, gradually glabrous |
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(5) |
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| 5 (4) |
Length of leaflet blade nearly 3 × width; legume wider, apex obtuse or broadly cuneate, base rounded or broadly cuneate. |
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23 D. stipulacea |
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Length of leaflet blade 1.5-2 × width; legume narrower, apex acute, base attenuate to cuneate. |
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24 D. assamica |
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| 6 (3) |
Leaflets shortly acuminate, never emarginate at apex; standard obovate-oblong; corolla pink. |
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26 D. hainanensis |
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Leaflets rounded, obtuse, or slightly emarginate at apex; standard orbicular; corolla white or light purple |
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(7) |
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| 7 (6) |
Leaflet abaxial surface with finely reticulate veinlets; legume 16-23 mm wide. |
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11 D. volubilis |
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Leaflet abaxial surface without obvious reticulate veinlets; legume narrow, 13-15 mm wide. |
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27 D. hupeana |
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| 8 (2) |
Leaflets less than 2 cm, numerous, usually more than 21 (21-41) (except D. tsoi occasionally with 17) |
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(9) |
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Leaflets more than 2 cm (except D. hancei with leaflets 1-2 cm) |
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(14) |
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| 9 (8) |
Legume reddish brown when dry, strongly reticulate throughout; leaflets 17-27, elliptic to oblong. |
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1 D. tsoi |
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Legume not reddish brown, finely reticulate everywhere or opposite seeds; leaflets 21-42, linear-oblong or narrowly oblong, 2.5-3 × as long as wide |
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(10) |
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| 10 (9) |
Leaflets trapezoid-oblong, two sides of base asymmetric, one side rounded, other side cuneate; petals long clawed; inflorescence densely rusty puberulent; legume brown and shiny when dry. |
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2 D. pinnata |
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Leaflets symmetric at base (except D. millettii with leaflets slightly asymmetric); petals shortly clawed; inflorescence somewhat hairy or glabrous; legume dull colored, not shiny when dry |
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(11) |
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| 11 (10) |
Leaflets membranous, oblong, 8-15 mm, appressed brown silky pubescent on both surfaces; standard transversely elliptic. |
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3 D. peishaensis |
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Leaflets papery, linear-oblong or narrowly oblong, glabrous on both surfaces or hairy when young, glabrous when old; standard oblong-obovate, broadly obovate, or orbicular |
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(12) |
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| 12 (11) |
Leaflets 31-41, obtuse or rounded at both ends; legume ca. 7.5 mm wide. |
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4 D. stenophylla |
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Leaflets 21-35, truncate, emarginate at apex, cuneate or broadly cuneate at base; legume 10-20 mm wide |
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(13) |
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| 13 (12) |
Standard oblong-obovate; legume reticulate opposite seeds. |
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5 D. mimosoides |
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Standard orbicular; legume veined throughout. |
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6 D. millettii |
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| 14 (8) |
Leaflets 3-5 |
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(15) |
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Leaflets 5-15 |
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(16) |
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| 15 (14) |
Leaflets suborbicular or obcordate, length and width of blade subequal, apex rounded and shortly caudate, both surfaces glabrous and adaxially shiny when old; teeth of calyx unequal, lowest lanceolate, longer than others; legume faintly reticulate opposite seeds. |
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7 D. sissoo |
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Leaflets ovate, longer than wide, obtuse, slightly emarginate at apex, abaxially densely rusty pubescent; teeth of calyx subequal, triangular; legume distinctly reticulate throughout. |
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8 D. henryana |
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| 16 (14) |
Legume half-moon-shaped, less than 2.5 cm when 1-seeded; inflorescence subsessile; woody climbers growing in littoral region. |
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9 D. candenatensis |
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Legume oblong, ligulate-oblong, or strap-shaped, longer than 3 cm; inflorescence with peduncle; plants not of littoral region |
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(17) |
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| 17 (16) |
Teeth of calyx subequal in length, triangular, broadly triangular, ovate-triangular, or ovate |
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(18) |
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Teeth of calyx unequal in length, lowest teeth lanceolate or oblong (D. rimosa with lowest tooth of calyx lanceolate, but subequal in length to others) |
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(21) |
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| 18 (17) |
Standard not reflexed, obovate or elliptic; ovary shortly stipitate. |
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10 D. hancei |
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Standard reflexed, orbicular or elliptic; ovary long stipitate |
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(19) |
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| 19 (18) |
Leaflets ovate-lanceolate, 7-10 cm, apex acute. |
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12 D. kingiana |
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Leaflets ovate, elliptic, or oblong, 3.5-6 cm, apex obtuse, rounded, or emarginate |
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(20) |
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| 20 (19) |
Climbers; leaflets 5-7, base cuneate; standard elliptic, base shortly auriculate. |
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13 D. benthamii |
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Trees; leaflets 9-13, base rounded; standard orbicular, base not auriculate. |
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14 D. burmanica |
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| 21 (17) |
Leaflets less than 4 cm (1-4 × 0.8-2 cm; though sometimes larger and up to 5.5 cm in D. ximengensis) |
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(22) |
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Leaflets more than 4 cm (4-14 × 2-8 cm; though sometimes smaller and less than 4 cm in D. yunnanensis) |
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(25) |
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| 22 (21) |
Climbers or shrubs; standard oblong, obovate-oblong, or suborbicular |
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(23) |
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Trees; standard obovate or obcordate |
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(24) |
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| 23 (22) |
Large climbers; leaflets thinly leathery, glabrous, shiny adaxially, veinlets finely and closely reticulate, conspicuously prominent on both surfaces. |
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15 D. dyeriana |
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Shrubs; leaflets papery, appressed sparsely grayish white pubescent and veins slightly impressed adaxially. |
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16 D. jingxiensis |
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| 24 (22) |
Leaflets (7-)11-13, leathery, ovate-elliptic or oblong, adaxially glabrous, terminal and lateral leaflets subequal in length. |
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17 D. cultrata |
| + |
Leaflets 7-9, thickly papery, elliptic or obovate, adaxially appressed pubescent, terminal and lateral leaflets very unequal in length (terminal leaflet often more than 4 × as large as lowest). |
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18 D. ximengensis |
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| 25 (21) |
Leaflets rounded at both ends, slightly emarginate at apex |
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(26) |
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Leaflets acuminate or acute at apex |
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(27) |
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| 26 (25) |
Leaflets 2.5-5(-7.5) × 1-2(-3.3) cm, length usually ca. 2 × width, both surfaces appressed puberulent, more densely so on midvein abaxially; standard obovate-oblong. |
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19 D. yunnanensis |
| + |
Leaflets 5-14 × 4.5-8 cm, length and width subequal or length slightly exceeding width, both surfaces glabrous; standard oblong. |
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20 D. obtusifolia |
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| 27 (25) |
Leaflets glabrous on both surfaces; legume ± inconspicuously reticulate, reticulation distinctly prominent opposite seeds. |
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21 D. odorifera |
| + |
Leaflets sparsely hairy; legume reticulate throughout, reticulation conspicuously and slightly prominent opposite seeds. |
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22 D. rimosa |
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