| 1 |
Mature carpels dehiscing along ventral sutures; torus dehiscent when fruit matured |
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(2) |
| + |
Mature carpels dehiscing along dorsal sutures or rarely along ventral sutures; torus indehiscent when fruit matured |
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(3) |
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| 2 (1) |
Evergreen; tepals 9, in 3 whorls, white, outer ones obovate-elliptic, inner ones nearly obovate-spatulate. |
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20 M. calcarea |
| + |
Deciduous; tepals 15 or 16, in 5 or 6 whorls, yellow, lanceolate to narrowly obovate. |
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29 M. decidua |
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| 3 (1) |
Brachyblasts or peduncles slender; fruit pendulous |
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(4) |
| + |
Brachyblasts robust; fruit erect after flowering |
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(9) |
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| 4 (3) |
Vegetative buds, young branches, petioles, leaf blade abaxial surfaces, and peduncles rust-colored tomentose or reddish brown erect villous |
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(5) |
| + |
Vegetative buds, young branches, petioles, leaf blade abaxial surfaces, and peduncles with sparse appressed trichomes or glabrous |
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(7) |
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| 5 (4) |
Vegetative buds, young branches, petioles, leaf blade abaxial surfaces, and peduncles reddish brown erect villous. |
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25 M. longipedunculata |
| + |
Vegetative buds, young branches, petioles, leaf blade abaxial surfaces, and peduncles rust-colored tomentose |
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(6) |
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| 6 (5) |
Gynoecium glabrous. |
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23 M. kwangtungensis |
| + |
Gynoecium with trichomes. |
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24 M. rufibarbata |
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| 7 (4) |
Leaf blade abaxially glaucous. |
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28 M. glaucifolia |
| + |
Leaf blade abaxially grayish green |
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(8) |
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| 8 (7) |
Stipular scar ca. 1/5 as long as petiole; inner tepals pure white. |
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26 M. conifera |
| + |
Stipular scar ca. 1/2 as long as petiole; inner tepals purplish. |
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27 M. ovoidea |
| |
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| 9 (3) |
Leaf blade apex obtuse to emarginate. |
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10 M. hongheensis |
| + |
Leaf blade apex acute, acuminate, cuspidate, or caudate |
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(10) |
| |
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| 10 (9) |
Fruit subglobose; mature carpels only base inserted on torus adaxially, dehiscing along ventral suture first and then partly along dorsal suture. |
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2 M. aromatica |
| + |
Fruit ovoid-ellipsoid, subterete, or ovoid; mature carpels completely or mostly inserted on torus adaxially, dehiscing along dorsal suture first and then along ventral suture |
|
(11) |
| |
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| 11 (10) |
Gynoecium with trichomes |
|
(12) |
| + |
Gynoecium glabrous |
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(16) |
| |
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|
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| 12 (11) |
Beak of mature carpel 5-7 mm. |
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8 M. ventii |
| + |
Beak of mature carpel less than 3 mm |
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(13) |
| |
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| 13 (12) |
Fruit cylindric. |
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7 M. zhengyiana |
| + |
Fruit ellipsoidal or ovoid |
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(14) |
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|
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| 14 (13) |
Mature carpels abaxially tuberculate. |
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11 M. caveana |
| + |
Mature carpels not abaxially tuberculate |
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(15) |
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| 15 (14) |
Leaf blade leathery, abaxially pale brownish pubescent, midvein white villous; fruit ovoid, 8-10 cm. |
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13 M. szechuanica |
| + |
Leaf blade thinly leathery, both surfaces glabrous; fruit ovoid-ellipsoid, 5-6 cm. |
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15 M. duclouxii |
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| 16 (11) |
Androecium with trichomes. |
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1 M. dandyi |
| + |
Androecium glabrous |
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(17) |
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| 17 (16) |
Outer tepals abaxially with appressed reddish brown trichomes. |
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19 M. forrestii |
| + |
Outer tepals abaxially glabrous |
|
(18) |
| |
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| 18 (17) |
Gynoecium or fruit ovoid |
|
(19) |
| + |
Gynoecium or fruit terete or ellipsoid |
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(21) |
| |
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|
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| 19 (18) |
Tepals white; stipular scar nearly 1/6 as long as petiole. |
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16 M. crassipes |
| + |
Tepals pale red or purplish red; stipular scar 1/4-1/2 as long as petiole |
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(20) |
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| 20 (19) |
Young branches and brachyblasts with rust-colored trichomes; stipular scar more than 1/2 as long as petiole. |
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3 M. lucida |
| + |
Young branches and brachyblasts glabrous; stipular scar nearly 1/4 as long as petiole. |
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4 M. grandis |
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| 21 (18) |
Stipular scar more than 1/2 as long as petiole |
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(22) |
| + |
Stipular scar less than 1/2 as long as petiole |
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(23) |
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| 22 (21) |
Leaf blade elliptic to obovate, 18-34.5 × 8-12 cm, abaxially with dense fine brown trichomes (difficult to see even under hand lens); tepals purple to purplish red. |
|
5 M. garrettii |
| + |
Leaf blade elliptic-obovate to narrowly obovate, 20-30 × 6-10 cm, abaxially glabrous; tepals white. |
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6 M. hookeri |
| |
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|
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| 23 (21) |
Gynoecium terete |
|
(24) |
| + |
Gynoecium ovoid or long ovoid |
|
(26) |
| |
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|
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| 24 (23) |
Leaf blade glabrous on both surfaces. |
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12 M. patungensis |
| + |
Leaf blade abaxially ± with trichomes |
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(25) |
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| 25 (24) |
Stipular scar less than 1/3 as long as petiole; leaf blade abaxial midvein reddish brown pubescent or scattered appressed hispidulous. |
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9 M. insignis |
| + |
Stipular scar 1/10-1/5 as long as petiole; leaf blade abaxially with pale brownish red trichomes. |
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14 M. chevalieri |
| |
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|
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| 26 (23) |
Young branches glabrous; leaf blade obovate. |
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21 M. obovalifolia |
| + |
Young branches ± with trichomes; leaf blade elliptic or narrowly elliptic |
|
(27) |
| |
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|
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| 27 (26) |
Tepals of inner 2 whorls transversely wavy striate. |
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22 M. oblonga |
| + |
Tepals of inner 2 whorls smooth |
|
(28) |
| |
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|
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| 28 (27) |
Mature carpels abaxially furrowed but not tuberculate. |
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17 M. pachyphylla |
| + |
Mature carpels abaxially not furrowed but tuberculate. |
|
18 M. fordiana |
