| 1 |
Leaves alternate. |
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(2) |
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Leaves opposite. |
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(4) |
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| 2 (1) |
Calyx lobes subulate-linear, as long as or longer than tube; corolla lobes often acute |
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3 Jasminum floridum |
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Calyx lobes deltate, truncate or subulate, shorter than or rarely as long as tube; corolla lobes often rounded. |
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(3) |
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| 3 (2) |
Leaflets (2 or)3(or 5), blade 3-12.5 cm; cymes in panicles, 10-120-flowered; pedicel 1-1.2(-2) cm |
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1 Jasminum subhumile |
| + |
Leaflets 3-9(-13), blade 0.2-6 cm; cymes in umbels, corymbs, or panicles, 1-10(-15)-flowered; pedicel 0.2-3 cm |
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2 Jasminum humile |
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| 4 (1) |
Leaves pinnatipartite or pinnately compound. |
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(5) |
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Leaves simple or 3-foliolate. |
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(8) |
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| 5 (4) |
Calyx lobes deltate, rarely subulate-linear, less than 2 mm |
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15 Jasminum polyanthum |
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Calyx lobes subulate-linear, (2-)3-10 mm. |
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(6) |
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| 6 (5) |
Inner surface of flowers pink, often reddish outside; leaves often irregularly divided with lateral leaflets decurrent onto rachis |
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13 Jasminum stephanense |
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Inner surface of flowers white, often reddish outside; leaves regularly divided, lateral leaflets not decurrent. |
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(7) |
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| 7 (6) |
Inflorescences subumbellate; corolla lobes 6-12 × 3-8 mm |
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12 Jasminum officinale |
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Inflorescences with middle pedicels conspicuously shorter than lateral ones; corolla lobes 13-22 × 8-14 mm |
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14 Jasminum grandiflorum |
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| 8 (4) |
Leaves 3-foliolate, sometimes with some leaves simple. |
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(9) |
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Leaves simple. |
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(16) |
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| 9 (8) |
Calyx lobes leafy; corolla yellow. |
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(10) |
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Calyx lobes not leafy; corolla white, sometimes red, pink, or purple on outside. |
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(11) |
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| 10 (9) |
Evergreen; corolla 2-4.5 cm in diam. |
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4 Jasminum mesnyi |
| + |
Deciduous; corolla 2-2.5 cm in diam. |
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5 Jasminum nudiflorum |
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| 11 (9) |
Terminal leaflet slightly larger than or equal to lateral leaflets. |
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(12) |
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Terminal leaflet much larger than lateral leaflets. |
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(13) |
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| 12 (11) |
Leaves leathery; inflorescences many flowered |
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16 Jasminum lanceolaria |
| + |
Leaves membranous; inflorescences 3-7-flowered |
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17 Jasminum flexile |
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| 13 (11) |
Leaflets 3-veined at base |
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6 Jasminum urophyllum |
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Leaflets pinnately veined. |
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(14) |
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| 14 (13) |
Terminal leaflet 6-8 × as large as lateral ones; terminal petiolule 1-6 mm |
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19 Jasminum wengeri |
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Terminal leaflet ca. 2 × as large as lateral ones; terminal petiolule 0.7-3 cm. |
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(15) |
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| 15 (14) |
Leaves glabrous, except for tufts of hairs in axils of main veins underneath; calyx glabrous |
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9 Jasminum dispermum |
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Leaves pubescent; calyx pilose |
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18 Jasminum sinense |
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| 16 (8) |
Calyx lobes deltate or subtruncate, 0-2 mm. |
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(17) |
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Calyx lobes subulate-linear, 2 mm or more. |
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(27) |
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| 17 (16) |
Leaves prominently 3- or 5-veined. |
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(18) |
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Leaves pinnately veined. |
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(19) |
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| 18 (17) |
Leaves long attenuate-acute; corolla lobes much shorter than tube |
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6 Jasminum urophyllum |
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Leaves acuminate, but not attenuatly so; corolla lobes longer than tube |
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25 Jasminum cinnamomifolium |
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| 19 (17) |
Venation obscure above and below; petiole 1-4.5 cm |
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16 Jasminum lanceolaria |
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Venation not obscure; petioles usually less than 2 cm. |
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(20) |
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| 20 (19) |
Leaves narrowly lanceolate to lanceolate, more than 3 × as long as broad |
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10 Jasminum duclouxii |
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Leaves broadly ovate, ovate, elliptic, to lanceolate or obovate to obovate-oblong, not more than 2.5 × as long as broad. |
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(21) |
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| 21 (20) |
Leaves 3.5-10 cm (rarely more). |
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(22) |
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Leaves 10-22 cm (rarely less). |
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(24) |
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| 22 (21) |
Inflorescences 9- to many flowered; corolla lobes 8-17 mm; leaf base cuneate to rounded |
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23 Jasminum seguinii |
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Inflorescences 1-5-flowered; corolla lobes 4-10 mm; leaf base rounded to truncate or subcordate. |
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(23) |
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| 23 (22) |
Leaves broadly ovate to elliptic or ovate-lanceolate, base broadly cuneate to truncate; calyx ca. 1 mm; corolla lobes 4-5 mm |
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24 Jasminum microcalyx |
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Leaves oblong to obovate-oblong, base truncate to subcordate; calyx ca. 3 mm; corolla lobes 8-10 mm |
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26 Jasminum pierreanum |
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| 24 (21) |
Leaves thick leathery, ovate, elliptic, or ovate-lanceolate; inflorescences axillary, rachis 2-3 cm |
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22 Jasminum coffeinum |
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Leaves papery or somewhat leathery, lanceolate to broadly lanceolate, or ovate, oblong to obovate; inflorescences axillary or terminal, rachis 5-10 cm. |
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(25) |
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| 25 (24) |
Leaves broadly ovate to ovate-lanceolate, broadest in lower third, often with tufts of hairs in the axils of the main veins and midrib below; corolla lobes 5-7 mm |
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9 Jasminum dispermum |
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Leaves oblong to elliptic-lanceolate, or ovate to obovate, broadest about middle; corolla lobes 8-11 mm. |
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(26) |
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| 26 (25) |
Leaves with ca. 6 primary veins on each side of midrib, lowest at a sharp angle to midrib; tip of corolla usually blunt in bud, corolla tube 1.8-2.5 cm |
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20 Jasminum subglandulosum |
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Leaves with 8 or 9 primary veins on each side of midrib, lowest at a broad angle to midrib; tip of corolla usually acute in bud, corolla tube 1.5-1.8 cm |
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21 Jasminum attenuatum |
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| 27 (16) |
Leaves strongly 2- or 4-veined laterally from base (sometimes obscurely pinnately veined in J. beesianum). |
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(28) |
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Leaves pinnately veined. |
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(32) |
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| 28 (27) |
Inflorescences with conspicuous leafy bracts at base |
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27 Jasminum pentaneurum |
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Inflorescences without leafy bracts at base. |
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(29) |
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| 29 (28) |
Leaves 1-4.5 cm. |
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(30) |
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Leaves 2.5-13 cm. |
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(31) |
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| 30 (29) |
Leaves ovate, primary veins 3-5 on each side of midrib; corolla white, tube 1.7-2 cm, lobes 14-16 mm |
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28 Jasminum guangxiense |
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Leaves ovate to lanceolate, primary veins 1-3 on each side of midrib, obscure, sometimes only basal pair slightly obvious; corolla red, tube 0.9-1.5 cm, lobes 3-9 mm |
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8 Jasminum beesianum |
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| 31 (29) |
Leaves ovate to lanceolate; calyx lobes (5-)10-17 mm |
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30 Jasminum nervosum |
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Leaves linear to narrowly elliptic or narrowly ovate; calyx lobes 2-4 mm |
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29 var. brachylobum |
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| 32 (27) |
Inflorescences and calyx glabrous. |
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(33) |
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Inflorescence and calyx ± hairy. |
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(36) |
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| 33 (32) |
Leaves 1-1.5 × 0.7-1 cm, obovate to elliptic or suborbicular |
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42 Jasminum yuanjiangense |
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Leaves 5-19 × 1.3-8.5 cm. |
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(34) |
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| 34 (33) |
Leaves leathery, primary veins 7-11 on each side of midrib; calyx lobes 5-18 mm, enlarged to 2-3 cm in fruit |
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43 Jasminum lang |
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Leaves papery, primary veins 3-5(-9) on each side of midrib; calyx lobes 2-5 mm, not enlarged in fruit. |
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(35) |
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| 35 (34) |
Leaves ca. 3 × as long as broad, primary veins 5-9 on each side of midrib; inflorescences 3-6-flowered, open; pedicel 10-40 mm; corolla tube 1-1.4 cm, lobes 0.7-0.9 cm |
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11 Jasminum fuchsiifolium |
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Leaves ca. 2 × as long as broad, primary veins 3-5 on each side of midrib; inflorescences many flowered, dense; pedicel 0-1 mm; corolla tube 1.5-2.5 cm, lobes 0.8-1.7 cm |
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35 Jasminum tonkinense |
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| 36 (32) |
Stems rusty villous and tomentose, sometimes densely so. |
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(37) |
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Stems glabrous, pubescent, or pilose, sometimes densely so, if villous then not rusty. |
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(41) |
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| 37 (36) |
Inflorescences 1-4-flowered. |
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(38) |
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Inflorescences many flowered. |
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(39) |
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| 38 (37) |
Leaf blade leathery, 1-3.5 × 1-2.5 cm |
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31 Jasminum nintooides |
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Leaf blade papery 7-10 × 2.5-7 cm |
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32 Jasminum craibianum |
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| 39 (37) |
Leaf blade with 6 or 7 primary veins on each side of midrib, elliptic to broadly ovate or cordate, 6.5-19 cm |
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33 Jasminum rufohirtum |
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Leaf blade with 3 or 4 primary veins on each side of midrib, ovate or elliptic to lanceolate, 1.5-11 cm. |
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(40) |
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| 40 (39) |
Inflorescences with leafy bracts at base; calyx lobes 1.5-2.5 mm |
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19 Jasminum wengeri |
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Inflorescences without leafy bracts at base; calyx lobes 5-14 mm |
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34 Jasminum elongatum |
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| 41 (36) |
Leaf blade 1-1.5 × 0.7-1 cm |
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42 Jasminum yuanjiangense |
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Leaf blade at least 2 × 1.5 cm. |
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(42) |
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| 42 (41) |
Leaves ca. 4 × as long as broad, narrowly lanceolate |
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7 Jasminum prainii |
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Leaves not narrowly lanceolate, 2-3 × as long as broad. |
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(43) |
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| 43 (42) |
Leaves without tufts of hairs in vein axils. |
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(44) |
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Leaves with tufts of hairs in axils of main veins and midrib below. |
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(46) |
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| 44 (43) |
Leaves ovate-cordate, base cordate, pilose on both surfaces; corolla tube 1.2-1.5 cm |
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36 Jasminum multiflorum |
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Leaves ovate to lanceolate, base often cuneate to rounded or truncate, pubescent or glabrous except along veins abaxially; corolla tube 1.5-3 cm. |
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(45) |
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| 45 (44) |
Leaves usually acuminate, 4.5-15 cm; corolla lobes 1.2-1.7 cm |
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35 Jasminum tonkinense |
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Leaves acute, 1.5-11 cm; corolla lobes 0.8-1.1 cm |
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34 Jasminum elongatum |
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| 46 (43) |
Pedicel less than 3 mm. |
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(47) |
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Pedicel (3-)8-20 mm. |
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(48) |
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| 47 (46) |
Inflorescences with leafy bracts at base; corolla tube ca. 3 cm; calyx green |
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37 Jasminum longitubum |
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Inflorescences without leafy bracts; corolla tube 1.4-2.2 cm; calyx white |
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38 Jasminum albicalyx |
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| 48 (46) |
Flowers solitary; leaves elliptic or narrowly ovate, rarely suborbicular, 1.5-2.7 cm broad |
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39 Jasminum rehderianum |
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Flowers 3-5 together, rarely solitary; leaves elliptic to lanceolate, orbicular or obovate, 2-8 cm broad. |
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(49) |
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| 49 (48) |
Petiole 5-10 mm; leaf apex acute to acuminate; corolla lobes lanceolate, ca. 3 mm broad |
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40 Jasminum hongshuihoense |
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Petiole 2-6 mm; leaf apex usually blunt, rarely very short acuminate; corolla lobes oblong to suborbicular, 5-9 mm broad |
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41 Jasminum sambac |
