| 1 |
Leaf blade pinninerved or subtriplinerved |
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(2) |
| + |
Leaf blade trinerved at base or triplinerved |
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(8) |
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| 2 (1) |
Young branchlets glabrous |
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(3) |
| + |
Young branchlets with ferruginous tomentum or appressed pubescence |
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(5) |
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| 3 (2) |
Young branchlets and petioles stouter; leaf blade thickly leathery, oblong or elliptic, larger, 6.5-13 × 1-4.2 cm, transverse veins distinct abaxially. |
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1 N. pinninervis |
| + |
Young branchlets and petioles relatively slender; leaf blade thinly leathery, ovate-lanceolate to lanceolate, elliptic, or oblong-lanceolate, smaller, 5-9 × 1.7-3.5 cm, transverse veins indistinct abaxially |
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(4) |
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| 4 (3) |
Leaf blade lateral veins 8-12 pairs; filaments glabrous; fruit globose. |
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2 N. wushanica |
| + |
Leaf blade lateral veins 5 pairs; filaments pubescent at base; fruit ovoid. |
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3 N. acuminatissima |
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| 5 (2) |
Young branchlets with dense ferruginous tomentum; fruit globose; perianth segments often persistent |
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(6) |
| + |
Young branchlets with appressed gray-brown pubescence; fruit ellipsoid; perianth segments deciduous |
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(7) |
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| 6 (5) |
Leaf blade 4-10 × 0.8-2.3 cm, petiole less than 7 mm; filaments and style glabrous. |
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4 N. oblongifolia |
| + |
Leaf blade 10-17 × 3.5-6 cm, petiole more than 10 mm; filaments and style hairy. |
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5 N. cambodiana |
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| 7 (5) |
Leaf blade lateral veins 13-15 pairs; fruiting tube cup-shaped, ca. 5 mm in diam |
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6 N. undulatifolia |
| + |
Leaf blade lateral veins 4-6 pairs; fruiting tube shallowly discoid, ca. 2 mm in diam.. |
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7 N. confertifolia |
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| 8 (1) |
Leaf blade trinerved at base. |
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8 N. menglaensis |
| + |
Leaf blade triplinerved |
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(9) |
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| 9 (8) |
Leaf blade glabrous abaxially when young |
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(10) |
| + |
Leaf blade hairy abaxially, at least on young leaves |
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(25) |
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| 10 (9) |
Leaf blade distinctly foveolate on both surfaces |
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(11) |
| + |
Leaf blade not foveolate on both surfaces |
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(15) |
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| 11 (10) |
Young branchlets with dense ferruginous or yellow-brown pubescence |
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(12) |
| + |
Young branchlets glabrous |
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(13) |
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| 12 (11) |
Leaf blade elliptic or rounded-elliptic, abruptly acute at apex, acumen obtuse, base rotund or rounded. |
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29 N. hainanensis |
| + |
Leaf blade obovate, apex obtusely rounded, base cuneate. |
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30 N. buisanensis |
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| 13 (11) |
Leaf blade oblong-lanceolate or oblong-obovate, apex obtusely rounded, lateral veins flat on both surfaces or impressed adaxially. |
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31 N. obtusifolia |
| + |
Leaf blade not as above, apex acuminate, lateral veins prominent on both surfaces |
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(14) |
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| 14 (13) |
Petiole more than 15 mm, leaf blade ovate-oblong or obovate-oblong; style densely pubescent. |
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32 N. parvigemma |
| + |
Petiole less than 10 mm, leaf blade ovate; style glabrous. |
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33 N. ovatifolia |
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| 15 (10) |
Petiole 2-4 cm |
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(16) |
| + |
Petiole 0.7-1.5 cm, longest less than 2 cm |
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(18) |
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| 16 (15) |
Leaf blade less than 10 cm, lateral veins 2 or 3 pairs, indistinct abaxially; fruit ellipsoid, 1.3-1.8 cm. |
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34 N. ellipsoidea |
| + |
Leaf blade more than 10 cm, lateral veins 3-5 pairs, distinct abaxially; fruit globose or subglobose (N. chui sometimes ellipsoid, but less than 1 cm) |
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(17) |
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| 17 (16) |
Leaf blade broadly ovate, ovate, or ovate-oblong, 11-20 × 6.8-13 cm; fruit globose, 15-16 mm in diam.. |
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35 N. kwangsiensis |
| + |
Leaf blade elliptic to ovate-elliptic, 8-16 × 2.7-9 cm; fruit subglobose or ellipsoid, ca. 8 mm in diam.. |
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36 N. chui |
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| 18 (15) |
Midrib and lateral veins impressed adaxially, prominent abaxially. |
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38 N. impressa |
| + |
Midrib and lateral veins prominent on both surfaces |
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(19) |
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| 19 (18) |
Leaf blade caudate-acuminate or shortly caudate-acuminate at apex |
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(20) |
| + |
Leaf blade acute or acuminate at apex |
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(22) |
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| 20 (19) |
Leaf blade lateral veins 2 or 3 pairs, except for lowermost pairs, veins arising from above middle of blade; fruit ellipsoid. |
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39 N. shingningensis |
| + |
Leaf blade lateral veins 3-6 pairs, except for lowermost pairs, veins arising from middle or below middle of blade; fruit ovoid or obovoid |
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(21) |
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| 21 (20) |
Young branchlets glabrous; fruit ovoid. |
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40 N. homilantha |
| + |
Young branchlets ferruginous pubescent; fruit obovoid. |
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41 N. purpurascens |
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| 22 (19) |
Leaf blade often larger, 7.5-13 × 2.5-4.5 cm, veinlets indistinct abaxially. |
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37 N. sutchuanensis |
| + |
Leaf blade often smaller, 3.5-6.5(-9) × 1.3-2.5(-4) cm, veins distinctly prominent abaxially |
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(23) |
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| 23 (22) |
Leaf blade oblong, obtusely acute at apex; style hirsute. |
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45 N. hiiranensis |
| + |
Leaf blade ovate, ovate-lanceolate, ovate-elliptic, or elliptic, acuminate or acute at apex; style with dense sericeous pubescence or pilose at base |
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(24) |
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| 24 (23) |
Petiole pubescent; filaments with sericeous pubescence. |
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42 N. pingbienensis |
| + |
Petiole glabrous; filaments pilose only at base. |
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44 N. daibuensis |
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| 25 (9) |
Leaf blade with golden yellow or pale yellow sericeous hairs abaxially |
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(26) |
| + |
Leaf blade with pubescence or tomentum, not sericeous hairs abaxially |
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(28) |
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| 26 (25) |
Leaf blade shortly acuminate at apex, acumen obtuse; fruit globose. |
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9 N. sericea |
| + |
Leaf blade falcate-acuminate, acuminate, or abruptly acute at apex, acumen not obtuse; fruit ellipsoid |
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(27) |
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| 27 (26) |
Leaf blade with dense golden yellow sericeous hairs abaxially, falcate-acuminate or acuminate at apex; rudimentary pistil glabrous. |
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10 N. aurata |
| + |
Leaf blade with dense appressed pale yellow sericeous pubescence abaxially, abruptly acute at apex; rudimentary pistil densely puberulent. |
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11 N. lunglingensis |
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| 28 (25) |
Young branchlets glabrous. |
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43 N. konishii |
| + |
Young branchlets hairy |
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(29) |
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| 29 (28) |
Midrib and lateral veins distinctly impressed adaxially on leaf blade; umbel many flowered. |
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12 N. velutina |
| + |
Midrib and lateral veins elevated adaxially on leaf blade; umbel 6-flowered |
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(30) |
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| 30 (29) |
Leaf blade lateral veins 1 pair, arising 3-8 mm from base and extending to apex, veinlets 6-9 at one side near margin. |
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13 N. chrysotricha |
| + |
Leaf blade lateral veins 2-6 pairs, lowermost pair arising from base or a little above base and extending to above middle of blade |
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(31) |
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| 31 (30) |
Leaf blade larger, mostly more than 12 cm, largest 15-30 cm |
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(32) |
| + |
Leaf blade smaller, mostly less than 10 cm, largest not over 13 cm |
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(36) |
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| 32 (31) |
Leaf blade obovate, ovate, or elliptic, often 2-2.5 × as long as broad |
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(33) |
| + |
Leaf blade mostly oblong shapes, often 3 × or more as long as broad |
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(34) |
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| 33 (32) |
Young branchlets and petioles with dense appressed gray-white short pubescence; fruiting pedicel 4-5 mm. |
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14 N. howii |
| + |
Young branchlets and petioles with dense ferruginous-yellow tomentum; fruiting pedicel ca. 10 mm. |
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15 N. alongensis |
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| 34 (32) |
Leaf blade ovate-oblong or oblong, gray pubescent abaxially, transverse veinlets indistinct. |
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16 N. villosa |
| + |
Leaf blade oblong-lanceolate or oblong-oblanceolate, with yellow-brown villous hairs or tomentum abaxially, transverse veinlets distinct |
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(35) |
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| 35 (34) |
Leaf blade caudate-acuminate at apex, broadly cuneate or rotund at base, abaxially with relatively dense yellow-brown tomentum, slightly glaucous or not. |
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17 N. tomentosa |
| + |
Leaf blade shortly acute or abruptly acute at apex, base cuneate, glabrate abaxially, mostly glaucous. |
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18 N. levinei |
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| 36 (31) |
Young branchlets, leaf blade abaxially, and petioles with dense ferruginous-yellow tomentum; petiole ca. 5 mm. |
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19 N. hsiangkweiensis |
| + |
Young branchlets, leaf blade abaxially, and petioles with pubescence; petiole often more than 10 mm |
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(37) |
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| 37 (36) |
Fruit obovoid-ellipsoid or ellipsoid to ovoid |
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(38) |
| + |
Fruit globose or nearly globose |
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(39) |
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| 38 (37) |
Leaf blade lanceolate or obovate-lanceolate, pubescent abaxially when old; rudimentary pistil densely hairy. |
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27 N. aciculata |
| + |
Leaf blade elliptic or oblong-elliptic, becoming glabrous abaxially when old; rudimentary pistil glabrous. |
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28 N. polycarpa |
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| 39 (37) |
Fruiting pedicels more than 15 mm. |
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20 N. longipedicellata |
| + |
Fruiting pedicels less than 12 mm |
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(40) |
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| 40 (39) |
Leaf blade slightly appressed pubescent or along veins yellow pubescent abaxially |
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(41) |
| + |
Leaf blade densely brown or gray villous abaxially when young |
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(42) |
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| 41 (40) |
Leaf blade apex acuminate, base obtuse to cuneate, not decurrent, with gray appressed pubescence abaxially when young; fruiting pedicels ca. 10 mm. |
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25 N. variabillima |
| + |
Leaf blade narrowly acuminate at apex, base cuneate, slightly decurrent, only along veins with yellow pubescence abaxially when young; fruiting pedicels 4-5 mm. |
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26 N. zeylanica |
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| 42 (40) |
Leaf blade lateral veins, except for lowermost pair, arising from middle or below middle of blade, most distinct adaxially; petiole 1-2 cm. |
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21 N. phanerophlebia |
| + |
Leaf blade lateral veins, except for lowermost pair, arising from above middle of blade, often indistinct adaxially; petiole 0.5-0.8 cm |
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(43) |
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| 43 (42) |
Leaf blade thickly leathery, shiny adaxially, margin not sinuous-rugose in a dry state. |
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22 N. pulchella |
| + |
Leaf blade thinly leathery, somewhat shiny adaxially, margin sinuous-rugose in a dry state |
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(44) |
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| 44 (43) |
Fruiting pedicels (6-)10-12 mm; leaf blade distinctly gray-white abaxially, lateral veins 4 or 5 pairs. |
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23 N. pallens |
| + |
Fruiting pedicels 3-5 mm; leaf blade grayish green abaxially, lateral veins 3 or 4 pairs. |
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24 N. brevipes |
