| 1 |
Leaves simple |
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(2) |
| + |
Leaves digitately 3-foliolate |
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(5) |
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| 2 (1) |
Inflorescence a raceme or panicle; bracts small, ovate to ovate-lanceolate. |
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4 F. paniculata |
| + |
Inflorescence a thyrse of cymelets, each initially enclosed by large overlapping incurved bracts |
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(3) |
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| 3 (2) |
Leaflets orbicular-cordate; standard with lobe as long as broad, contracted above auricles, and obovate or obcordate. |
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1 F. chappar |
| + |
Leaflets ovate, narrowly ovate, elliptic, or oblong; standard with lobes not contracted above auricles, transversely elliptic or broadly orbicular; wings much narrower than keel |
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(4) |
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| 4 (3) |
Leaves 3-7 cm wide, base rounded or slightly cordate, petiole usually 5-15 mm. |
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3 F. strobilifera |
| + |
Leaves 1.5-2.5 cm wide, base cuneate, subsessile or petiole usually 1-5 mm. |
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2 F. fluminalis |
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| 5 (1) |
Prostrate herbs; stipules persistent; inflorescence compact |
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(6) |
| + |
Erect shrubs; stipules usually deciduous (persistent in F. stricta) |
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(7) |
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| 6 (5) |
Leaflets 4-7 cm, elliptic or ovate-lanceolate; stipules linear-lanceolate; inflorescence 2-2.5 cm. |
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13 F. prostrata |
| + |
Leaflets 1-5 cm, oblong or almost obovate; stipules ovate; inflorescence 2-10 cm. |
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14 F. procumbens |
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| 7 (5) |
Inflorescence a long-pedunculate capitulum; bracts 1.5-2 cm, persistent. |
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15 F. involucrata |
| + |
Inflorescence peduncle extremely short, racemes or panicles; bracts 0.4-1.2 cm, persistent or deciduous |
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(8) |
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| 8 (7) |
Peduncle conspicuous, axis slender. |
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5 F. lineata |
| + |
Peduncle inconspicuous, axis robust |
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(9) |
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| 9 (8) |
Leaflets usually more than 20 cm; stipules persistent; standard strongly contracted, narrowed above auricles. |
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6 F. stricta |
| + |
Leaflets less than 20 cm; stipules deciduous; standard not contracted |
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(10) |
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| 10 (9) |
Leaflets usually 8-19 cm, lateral veins not grooved adaxially |
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(11) |
| + |
Leaflets usually 2-10 cm, lateral veins ± grooved adaxially |
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(13) |
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| 11 (10) |
Whole plant densely rusty tomentose; bracts elliptic to elliptic-lanceolate, apex obtuse. |
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7 F. latifolia |
| + |
Whole plant densely gray or grayish brown pubescent or silky villous; bracts ovate to triangular |
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(12) |
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| 12 (11) |
Petiole with narrow wings; leaflets usually glabrous except for veins; inflorescence lax. |
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8 F. macrophylla |
| + |
Petiole without wings; leaflets densely pubescent, especially in lower part; inflorescence congested. |
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9 F. mengpengensis |
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| 13 (10) |
Branchlets without obvious lenticels; leaflets abaxially glabrous or almost glabrous except for veins. |
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12 F. kweichowensis |
| + |
Branchlets with obvious lenticels; leaflets abaxially densely tomentose |
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(14) |
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| 14 (13) |
Branchlets and abaxial surface of leaflets gray to grayish brown tomentose. |
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10 F. wallichii |
| + |
Branchlets and both sides of leaflets brown tomentose. |
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11 F. grahamiana |
