| 1 |
Bracts densely imbricate, broad, covering rachis, not or only apical one surrounding flowers; inflorescences conical. |
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(2) |
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Bracts laxly or densely arranged, not imbricate, usually surrounding flowers; inflorescences not conical. |
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(7) |
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| 2 (1) |
Flowers 1 per bract; filament 1--2 mm |
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1 Hedychium efilamentosum |
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Flowers 2--6 per bract; filament more than 2 mm. |
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(3) |
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| 3 (2) |
Flowers white. |
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(4) |
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Flowers yellow. |
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(5) |
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| 4 (3) |
Flowers 2 or 3 per bract; corolla tube ca. 8 cm, lobes ca. 5 cm; labellum 4--6 × 4--6 cm |
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2 Hedychium coronarium |
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Flowers 3--5 per bract; corolla tube 3.5--4 cm, lobes 1.7--2 cm; labellum 2.5--3 × 2--2.2 cm |
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3 Hedychium ximengense |
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| 5 (3) |
Labellum 2-lobed at apex, lobes ca. 3.8 × 2.8 cm |
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4 Hedychium bipartitum |
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Labellum 2-cleft at apex. |
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(6) |
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| 6 (5) |
Leaves glabrous on both surfaces; labellum wholly yellow, wider than long |
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5 Hedychium flavum |
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Leaves pubescent abaxially; labellum creamy yellow with an orange patch at base, longer than wide |
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6 Hedychium flavescens |
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| 7 (1) |
Flowers 1 per bract. |
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(8) |
| + |
Flowers more than 2 per bract. |
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(17) |
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| 8 (7) |
Flowers densely arranged, corolla tube to 2.5 cm. |
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(9) |
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Flowers laxly or densely arranged; corolla tube 3.5--8 cm. |
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(12) |
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| 9 (8) |
Bracts ca. 0.5 cm; labellum entire and mucronate at apex |
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7 Hedychium parvibracteatum |
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Bracts 0.7--2 cm; labellum nearly 2-lobed or 2-cleft at apex. |
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(10) |
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| 10 (9) |
Corolla tube 2.5--3 cm; labellum ca. 1.6 cm |
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8 Hedychium densiflorum |
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Corolla tube 1.2--1.5 cm; labellum 0.7--1 cm. |
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(11) |
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| 11 (10) |
Bracts 1.3--1.5 cm; labellum ca. 1 cm |
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9 Hedychium sinoaureum |
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Bracts 0.7--1 cm; labellum ca. 0.7 cm |
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10 Hedychium nutantiflorum |
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| 12 (8) |
Corolla tube to 8 cm; filament shorter than labellum; ligule hairy |
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11 Hedychium spicatum |
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Corolla tube 3.5--5 cm; filament much longer than labellum; ligule glabrous. |
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(13) |
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| 13 (12) |
Labellum apically entire but projecting |
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12 Hedychium convexum |
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Labellum apically 2-cleft for 1/2 to all its length. |
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(14) |
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| 14 (13) |
Labellum 3--3.5 cm. |
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(15) |
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Labellum 1.3--2 cm. |
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(16) |
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| 15 (14) |
Petiole 3--7 cm; ligule 3--6 cm; labellum apically 2-cleft for ca. 2/3 its length, lobes narrowly lanceolate |
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13 Hedychium glabrum |
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Petiole ca. 1.5 cm; ligule ca. 1.5 cm; labellum apically 2-cleft for ca. 1/2 its length, lobes linear |
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14 Hedychium tengchongense |
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| 16 (14) |
Ligule entire, 1.5--2.5 cm; labellum obovate, ca. 2 cm, apically 2-cleft for ca. 1/2 its length; anther 1--1.2 cm |
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15 Hedychium yunnanense |
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Ligule 2-cleft, ca. 0.4 cm; labellum narrowly oblong, ca. 1.3 cm, apically 2-cleft to base; anther ca. 0.5 cm |
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16 Hedychium pauciflorum |
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| 17 (7) |
Anther 2--3 mm; bracts and calyx densely brown sericeous |
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17 Hedychium villosum |
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Anther more than 5 mm; bracts and calyx glabrous or hairy, but not brown sericeous. |
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(18) |
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| 18 (17) |
Leaves glabrous on both surfaces. |
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(19) |
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Leaves hairy abaxially, sometimes only along midvein. |
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(23) |
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| 19 (18) |
Flowers yellow or red; filament ca. 5 cm. |
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(20) |
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Flowers white; filament 2.2--4 cm. |
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(21) |
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| 20 (19) |
Flowers yellow; labellum entire, emarginate, or shortly 3-toothed at apex |
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18 Hedychium bijiangense |
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Flowers red; labellum deeply 2-cleft at apex |
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19 Hedychium coccineum |
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| 21 (19) |
Bracts 4.5--6 cm; filament 3.5--4 cm, anther ca. 12 mm |
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20 Hedychium forrestii |
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Bracts 2.5--4.6 cm; filament 2.2--2.8 cm, anther 5--9 mm. |
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(22) |
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| 22 (21) |
Plants 1--1.2 m tall; corolla tube villous; labellum apically 2-cleft to base; filament longer than labellum, anther ca. 5 mm |
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21 Hedychium kwangsiense |
| + |
Plants to 0.5 m tall; corolla tube glabrous; labellum apically slightly 2-lobed or 2-cleft for ca. 1/2 its length; filament equaling labellum, anther ca. 9 mm |
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22 Hedychium brevicaule |
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| 23 (18) |
Leaves hairy only along midvein abaxially; labellum wholly white; filament ca. 1.3 cm |
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23 Hedychium yungjiangense |
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Leaves uniformly hairy abaxially; labellum white with different color at base or center; filament 2.4--6.8 cm. |
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(24) |
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| 24 (23) |
Labellum suborbicular, 1.8--2.2 × 1.8--2 cm. |
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(25) |
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Labellum orbicular, ovate, or obovate, 2.5--3.5 × 2--2.5 cm. |
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(26) |
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| 25 (24) |
Corolla tube yellowish; labellum flesh-colored at base; filament flesh-colored, 5.2--5.7 cm, anther yellow |
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24 Hedychium neocarneum |
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Corolla tube white; labellum yellowish at base; filament white, 5.6--6.8 cm, anther white |
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25 Hedychium puerense |
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| 26 (24) |
Labellum pale purple at base; filament purple, 5--5.5 cm |
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26 Hedychium simaoense |
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Labellum with yellow midvein or orange spots at center; filament yellow-red, 2.4--3.5 cm. |
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(27) |
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| 27 (26) |
Labellum with yellow midvein, broadly ovate, ca. 2.5 × 2 cm; filament ca. 2.4 cm |
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27 Hedychium tienlinense |
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Labellum with orange spots at center, obovate, 3--3.5 × 2--2.5 cm; filament 3--3.5 cm |
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28 Hedychium qingchengense |
