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| 1 |
Corolla deeply 5lobed; stamens exserted. |
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(2) |
| + |
Corolla entire or shallowly lobed; stamens included. |
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(5) |
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| 2 (1) |
Cymes capitate; bracts ± persistent, broadly obovate, spatulate, or circular, abaxially tomentose; flowers sessile or nearly so |
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19 Argyreia osyrensis |
| + |
Cymes not capitate; bracts early deciduous; flowers pedicellate. |
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(3) |
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| 3 (2) |
Leaf blade elliptic to ovate, usually silvery sericeous abaxially, base rounded or truncate, rarely shallowly cordate; fruiting sepals with recurved or crinkled apices |
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20 Argyreia acuta |
| + |
Leaf blade broadly ovate to nearly circular, dull yellowish tomentose abaxially, base distinctly cordate, rarely subtruncate; fruiting sepals with flat or slightly revolute apices. |
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(4) |
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| 4 (3) |
Inflorescences usually 4-6flowered; peduncle 1.5-2 cm; sepals ovateoblong, 6-8 mm, subequal; Taiwan |
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21 Argyreia formosana |
| + |
Inflorescences usually 9-40flowered; peduncle 2.5-7 cm; sepals broadly ovatecircular, ca. 5 mm, unequal, outer 3 longer; Guangxi, Yunnan |
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22 Argyreia fulvocymosa |
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| 5 (1) |
Bracts early deciduous. |
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(6) |
| + |
Bracts persistent. |
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(13) |
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| 6 (5) |
Leaf blade ovate to circular, base cordate. |
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(7) |
| + |
Leaf blade ovate to ovateelliptic, oblong to lanceolate, base broadly cuneate to rounded or truncate. |
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(9) |
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| 7 (7) |
Bracts 3.5-5 cm, ovate, oblong, or elliptic; leaf blade densely sericeoustomentose abaxially; corolla 6-6.5 cm A.nervosa |
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(7) |
| + |
Bracts 0.5-1 cm, linear to oblong; leaf blade sparsely strigose abaxially; corolla 2.8-5.5 cm. |
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(8) |
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| 8 (7) |
Sepals ± equal, broadly elliptic to ovate, 9-11 mm, densely golden woolly abaxially; corolla funnelform, 2.8-4 cm, purplered |
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1 Argyreia strigillosa |
| + |
Sepals unequal, outer 3 shorter, ovateoblong, 4-5 mm, abaxially ± yellowish sericeous; corolla funnelform, flaring strongly from base, 4-5.5 cm, purple |
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2 Argyreia maymyo |
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| 9 (6) |
Peduncle more than 10 cm. |
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(10) |
| + |
Peduncle 0.5-7 cm. |
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(11) |
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| 10 (9) |
Leaf blade yellowish hispid or strigose abaxially; outer sepals elliptic, ca. 4 3 mm, abaxially hispid; fruit 8-10 mm in diam., dark red |
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5 Argyreia henryi |
| + |
Leaf blade densely silvery sericeous abaxially; outer sepals ovate, ca. 7 5 mm, abaxially silvery sericeous; fruit 6-8 mm in diam., red |
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12 Argyreia splendens |
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| 11 (9) |
Leaf blade densely strigose adaxially |
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4 Argyreia velutina |
| + |
Leaf blade glabrous or sparsely strigose adaxially. |
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(12) |
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| 12 (11) |
Corolla pale violet or pink, 5-6.5 cm; pedicel 5-15 mm; outer 2 sepals broadly elliptic, 8-10 mm, inner 3 oblong, shorter, slightly emarginate |
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3 Argyreia mollis |
| + |
Corolla white, ca. 4.8 cm; pedicel ca. 2.5 mm; sepals all ovateoblong, ca. 4.5 mm |
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13 Argyreia cheliensis |
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| 13 (5) |
Bracts 2-13 mm. |
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(14) |
| + |
Bracts 15-40 mm. |
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(17) |
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| 14 (13) |
Inflorescences few to many flowered; lianas with stout stems; anthers sagittate, 4.5-5.5 mm. |
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(15) |
| + |
Flowers solitary; herbs or scandent shrubs with slender stems; anthers oblong, 2.5-4 mm. |
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(16) |
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| 15 (14) |
Leaf blade narrowly oblong or narrowly oblonglanceolate; petiole 1-2 cm; peduncle 1-3 cm; filaments 1.7-2.2 cm |
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14 Argyreia monglaensis |
| + |
Leaf blade ovatecircular; petiole 6.5-7 cm; peduncle 10.5-13 cm; filaments ca. 1.1 cm |
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18 Argyreia fulvovillosa |
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| 16 (14) |
Leaf blade linear, 9-13 0.7-1 cm; sepals ovate, ca. 10 5-6 mm; corolla pale purple, 4-4.5 cm |
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15 Argyreia lineariloba |
| + |
Leaf blade ovate to ovatedeltate, 3-4.5 1.5-2.5 cm; sepals linearlanceolate, outer ca. 20 2-3 mm; corolla red, ca. 7 cm |
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16 Argyreia baoshanensis |
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| 17 (13) |
Inflorescences long pedunculate, (3-)6-30 cm; bracts ligulate, attenuatelanceolate, or elliptic, both ends acute, or apically attenuate. |
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(18) |
| + |
Inflorescences short pedunculate, mostly 1-2.5(-5) cm; bracts ovateelliptic, broadly ovate, or ovate, obtuse or acute. |
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(20) |
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| 18 (17) |
Inflorescences to 3-flowered; corolla urceolate-funnelform, 2.5-3.5 cm; sepals ± equal, broadly ovate to elliptic |
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9 Argyreia monosperma |
| + |
Inflorescences many flowered, capitate or cymose; corolla funnelform, 3.5-5.5 cm; sepals unequal, outer 3 ovate-lanceolate, lanceolate, ovateoblong, to oblong. |
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(19) |
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| 19 (18) |
Indumentum brown or dull yellow, ± hirsute; inflorescences capitate, dense; bracts sessile, elliptic to lanceolate, both ends acute; sepals lanceolate, ovate oblong, to oblong |
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10 Argyreia capitiformis |
| + |
Indumentum whitish villous; inflorescences cymose; bracts petiolate, ligulate, acuminate; outer 3 sepals ovatelanceolate, inner 2 obovateelliptic, obtuse |
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17 Argyreia mastersii |
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| 20 (17) |
Leaf base cordate; sepals ± equal, 1-1.2 cm; indumentum ashy or whitish |
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7 Argyreia wallichii |
| + |
Leaf base cuneate, rounded, truncate, or shallowly cordate; sepals unequal, outer 3 larger, 1.2-1.7 cm; indumentum yellowish or pale brownish. |
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(21) |
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| 21 (20) |
Corolla 5-7 cm; style to 3.5 cm; fruit globose, 8-10 mm in diam. |
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8 Argyreia pierreana |
| + |
Corolla 4.2-4.5 cm; style ca. 1.1 cm; fruit ellipsoid, 6-7 ca. 5 mm |
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11 Argyreia eriocephala |
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