1 |
Leaves trinerved or triplinerved |
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(2) |
+ |
Leaves pinninerved |
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(18) |
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2 (1) |
Deciduous; fruits globose; short branchlets bearing inflorescence in leaf axil developing into normal branch |
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(3) |
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Evergreen; fruits ellipsoid; short branchlets bearing inflorescence usually not developing into normal branch |
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(5) |
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3 (2) |
Leaves trifid, occasionally pentafid, trinerved, sometimes pentanerved. |
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24 L. obtusiloba |
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Leaves entire, trinerved or triplinerved |
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(4) |
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4 (3) |
Umbels pedunculate; leaves trinerved or triplinerved. |
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23 L. neesiana |
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Umbels not pedunculate or peduncles less than 3 mm; leaves triplinerved. |
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22 L. rubronervia |
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5 (2) |
Umbels solitary, inserted at upper leaf axil and lower bract axil on current year branchlets, peduncles slender, 1-2.5 cm, 10-20 × length of flower stipe; male flowers: stamens in 3rd whorl sometimes sterile, fasciated. |
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25 L. tienchuanensis |
+ |
Inflorescences 1 to several, inserted on short branchlets, short branchlets usually not developing into normal branchlets, not pedunculate or shortly pedunculate and peduncles rather thick, usually less than 1 cm; male flowers: stamens in 3rd whorl fertile |
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(6) |
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6 (5) |
Umbels distinctly pedunculate |
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(7) |
+ |
Umbels not pedunculate or shortly pedunculate, peduncle less than 3 mm |
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(8) |
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7 (6) |
Leaf blade elliptic to narrowly elliptic, caudate at apex, densely golden or white appressed sericeous abaxially, first and second pairs lateral veins not joined at apex and not inflexed. |
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26 L. chunii |
+ |
Leaf blade ovate or ovate-oblong, apex acuminate, densely ferruginous pubescent on veins and then glabrous abaxially, first and second pairs lateral veins joined at apex and inflexed. |
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27 L. tonkinensis |
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8 (6) |
Leaf blade usually 15 cm, rarely 10-12 cm; branchlets stout, current year branchlets usually more than 3 mm in diam |
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(9) |
+ |
Leaf blade usually 6-11 cm (ca. 3.5 cm in L. fragrans, ca. 5 cm in L. supracostata); current year branchlets usually less than 3 mm in diam |
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(11) |
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9 (8) |
Young branchlets and abaxial surface of leaf blade glabrous. |
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30 L. lungshengensis |
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Young branchlets and abaxial surface of leaf blade densely hairy |
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(10) |
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10 (9) |
Young branchlets and abaxial surface of leaf blade ferruginous or brown pubescent; leaf blade elliptic or oblong, leathery; fruit stipes more than 5 mm. |
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28 L. prattii |
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Young branchlets and abaxial surface of leaf blade densely yellowish villous or tomentose; leaf blade broadly ovate, papery; fruit stipes not more than 5 mm. |
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29 L. guangxiensis |
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11 (8) |
Young branchlets and abaxial surface of leaf blade very densely hairy, 2-year-old branchlets and leaves rather densely hairy, at least on furcate part of branchlet and veins of leaf blade abaxially |
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(12) |
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Young branchlets and abaxial surface of leaf blade laxly or densely pubescent, later glabrate or nearly glabrous |
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(14) |
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12 (11) |
Leaf blade ovate, elliptic, or subrounded, acuminate or caudate-acuminate at apex, young branchlets and abaxial surface of leaf blade densely golden sericeous, brown pubescent, or glabrous. |
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38 L. aggregata |
+ |
Leaf blade elliptic, oblong, or ovate, apex acuminate, young branchlets and abaxial surface of leaf blade densely gray-brown tomentose or yellowish brown tomentose |
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(13) |
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13 (12) |
Buds, young branchlets, and abaxial surface of leaf blade densely gray-brown tomentose; 2-year-old branchlets gray-brown, slightly pubescent, rather smooth; leaf blade ovate or elliptic, old leaves at least tomentose abaxially on veins. |
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36 L. floribunda |
+ |
Buds densely brown pubescent, young branchlets and abaxial surface of leaf blade, especially petiole, densely yellowish brown pubescent; 2-year-old branchlets yellowish brown, nearly glabrous, many lenticellate, rather scabrous; leaf blade oblong or obovate, later glabrate or only villous on midrib. |
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37 L. villipes |
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14 (11) |
Fruits up to 1.4 cm; old leaves sometimes slightly black pubescent abaxially. |
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35 L. thomsonii |
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Fruits less than 1 cm; old leaves not slightly black pubescent abaxially |
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(15) |
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15 (14) |
Leaf veins more convex adaxially than abaxially; filament, ovary, and style pubescent or glabrous |
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(16) |
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Leaf veins more convex abaxially than adaxially; filament, ovary, and style ± pubescent |
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(17) |
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16 (15) |
Leaf blade caudate-acuminate at apex, ± repand on margin, first pair of lateral veins not elongate along margin up to apex; filament, ovary, and style pubescent. |
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31 L. supracostata |
+ |
Leaf blade acuminate at apex, not repand on margin, first pair of lateral veins elongate along margin up to apex, sometimes very near margin; filament, ovary, and style glabrous. |
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32 L. fragrans |
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17 (15) |
Branch surface with a thin layer of white exudations; leaf blade broadly ovate or broadly elliptic, sometimes ovate or elliptic, acute at apex. |
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33 L. limprichtii |
+ |
Branch surface without white exudations; leaf blade narrowly ovate, oblong, or oblong-lanceolate, caudate-acuminate at apex. |
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34 L. pulcherrima |
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18 (1) |
Umbels each one inserted at both sides under apical or axillary buds (i.e., short branch) or mixed bud (e.g., L. glauca), short branchlet developing into normal branchlet |
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(19) |
+ |
Inflorescences clustered in leaf axil (i.e., many umbels inserted under apical bud of short branchlets in leaf axil), short branchlet usually 2-3 mm, developing or not developing into normal branchlet |
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(27) |
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19 (18) |
Umbels distinctly pedunculate; hypocarpium developed, cup-shaped or shallowly cup-shaped, enclosed at or above base of fruit; fertile stamens with funnelform and long-stipitate glands |
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(20) |
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Umbels not pedunculate or peduncles shorter than pedicels and fruit stipes; hypocarpium not distinctly developed; fertile stamens with broadly reniform and stipitate glands |
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(22) |
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20 (19) |
Leaves loose; fruits globose. |
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3 L. chienii |
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Leaves clustered at apex of branch; fruits ellipsoid |
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(21) |
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21 (20) |
Hypocarpium cup-shaped; trees. |
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1 L. megaphylla |
+ |
Hypocarpium shallowly cup-shaped; shrubs. |
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2 L. setchuenensis |
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22 (19) |
Umbels pedunculate, peduncles shorter than stipes of flowers and fruits |
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(23) |
+ |
Umbels not pedunculate or peduncles less than 3 mm |
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(25) |
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23 (22) |
Leaf blade oblanceolate or obovate, red in autumn; young branchlets grayish white or grayish yellow, scabrous. |
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4 L. erythrocarpa |
+ |
Leaf blade elliptic or broadly elliptic; young branchlets smooth, greenish gray or yellow-green |
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(24) |
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24 (23) |
Young branchlets without lenticels, yellow-green; fruits less than 1 cm in diam., stipes without lenticels. |
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5 L. reflexa |
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Young branchlets with lenticels, greenish gray; fruits more than 1 cm in diam., stipes with lenticels. |
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6 L. praecox |
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25 (22) |
Leaf blade obovate to oblanceolate, usually apex rounded; branchlets gray or grayish black. |
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9 L. kariensis |
+ |
Leaf blade broadly ovate, elliptic, or elliptic-lanceolate, acuminate or acute at apex; branchlets yellow-green or white-yellow |
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(26) |
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26 (25) |
Young branchlets white-yellow, brown pubescent; leaf blade broadly ovate or elliptic, occasionally nearly lanceolate; bud scales not keeled. |
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7 L. glauca |
+ |
Young branchlets yellow-green, glabrous; leaf blade elliptic-lanceolate, apex rounded; bud scales keeled. |
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8 L. angustifolia |
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27 (18) |
Umbels not pedunculate or shortly pedunculate, less than 3 mm, short branchlets bearing umbels not developed |
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(28) |
+ |
Umbels and infructescences pedunculate, peduncles usually longer than or equaling length of pedicels and fruit stipes, short branchlets bearing umbels developing into normal branchlets |
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(30) |
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28 (27) |
Young branchlets and abaxial surface of leaves densely yellow-brown villous, later slightly villous; leaf blade 6-11 × 3.5-6 cm. |
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19 L. nacusua |
+ |
Young branchlets and abaxial surface of leaves laxly or densely yellow-white, gray-green, or yellow-brown pubescent, later glabrous or glabrate; leaf blade 3-9 × 1.5-3.5 cm |
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(29) |
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29 (28) |
Perianth tube indistinct; leaf blade 4-9 cm. |
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20 L. communis |
+ |
Perianth tube obconical; leaf blade 3-5 cm. |
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21 L. akoensis |
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30 (27) |
Peduncles slender, more than ca. 4 × length of pedicels and ca. 7 × length of fruit stipes; fruits ovate. |
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10 L. gracilipes |
+ |
Peduncles less than 4 × length of pedicels and 7 × length of fruit stipes; fruits globose |
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(31) |
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31 (30) |
Leaf blade glabrous or laxly pubescent abaxially and on veins |
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(32) |
+ |
Leaf blade densely pubescent abaxially |
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(35) |
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32 (31) |
Leaf blade narrowly elliptic, usually more than 13 cm, reddish when dry. |
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11 L. longipedunculata |
+ |
Leaf blade elliptic-lanceolate, lanceolate, or oblong, usually less than 13 cm, not reddish when dry |
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(33) |
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33 (32) |
Lateral veins on both surfaces of leaf blade indistinct, leaf blade elliptic-lanceolate, papery. |
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12 L. kwangtungensis |
+ |
Lateral veins on both surfaces of leaf blade distinct, leaf blade oblong, elliptic, or lanceolate, leathery, thinly leathery, or papery |
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(34) |
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34 (33) |
Leaf blade leathery, oblong, grayish brown when dry; young branchlets robust, usually more than 3 mm thick. |
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13 L. robusta |
+ |
Leaf blade papery or thinly leathery, elliptic to lanceolate, grayish brown or purple-brown when dry; young branchlets usually less than 3 mm thick. |
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14 L. metcalfiana |
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35 (31) |
Leaf blade subleathery, densely brown pubescent or villous |
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(36) |
+ |
Leaf blade papery, yellow-white pannose or gray-white or gray-yellow hirsute abaxially |
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(37) |
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36 (35) |
Lateral veins 5-7 pairs, reticulate veins convex, honeycombed adaxially; young branchlets cylindric; leaf blade narrowly elliptic, 7.5-20.5 × 3-8 cm, shortly acuminate at apex. |
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15 L. foveolata |
+ |
Lateral veins 9 or 10 pairs, reticulate veins not convex, not honeycombed adaxially; young branchlets angular; leaf blade usually ovate-oblong, 11-18 × 4-7 cm, cuneate at apex. |
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16 L. menghaiensis |
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37 (35) |
Leaf blade yellow-white pannose abaxially; fruits 4-5 mm in diam.. |
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17 L. motuoensis |
+ |
Leaf blade gray-white or gray-yellow hirsute abaxially; fruits ca. 6 mm in diam.. |
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18 L. latifolia |
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