| 1 |
Corolla tube 5 cm or longer; leaves in whorls of 3-5 |
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1 Clerodendrum indicum |
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Corolla tube less than 5 cm; leaves opposite, rarely in whorls of 3. |
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(2) |
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| 2 (1) |
Calyx truncate or subtruncate at anthesis. |
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(3) |
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Calyx 5-lobed or 5-dentate at anthesis. |
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(4) |
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| 3 (2) |
Subshrubs 0.3-0.5 m tall; leaf blade membranous; calyx ca. 2 mm; corolla tube ca. 5 mm, lobes ca. 5 mm |
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33 Clerodendrum subscaposum |
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Shrubs 1-4 m tall; leaf blade papery; calyx ca. 5 mm; corolla tube ca. 7 mm, lobes 6-12 mm |
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34 Clerodendrum serratum |
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| 4 (2) |
Inflorescences 3-10-flowered. |
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(5) |
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Inflorescences more than 10-flowered. |
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(7) |
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| 5 (4) |
Corolla tube equal or slightly longer than calyx; calyx lobes triangular-ovate to broadly ovate |
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10 Clerodendrum fortunatum |
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Corolla tube much longer than calyx; calyx lobes triangular-lanceolate. |
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(6) |
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| 6 (5) |
Leaf blade papery; inflorescences terminal; calyx deeply lobed, lobes ca. 1 cm, triangular-lanceolate |
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31 Clerodendrum griffithianum |
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Leaf blade thick papery; inflorescences axillary or rarely subterminal; calyx dentate or subtruncate in fruit |
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32 Clerodendrum inerme |
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| 7 (4) |
Leaf blade abaxially with numerous peltate glands usually covered with a sand-colored secretion. |
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(8) |
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Leaf blade abaxially with few or no peltate glands. |
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(10) |
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| 8 (7) |
Leaf blade shallowly palmately 3-5-lobed |
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4 Clerodendrum paniculatum |
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Leaf blade not lobed. |
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(9) |
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| 9 (8) |
Stamens ca. 2 cm |
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2 Clerodendrum intermedium |
| + |
Stamens 4.5-7.5 cm |
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3 Clerodendrum japonicum |
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| 10 (7) |
Leaf blade 2-3 as long as wide. |
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(11) |
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Leaf blade less than to 2 as long as wide. |
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(19) |
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| 11 (10) |
Inflorescences capitate or flat-topped cymes with a short axis. |
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(12) |
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Inflorescences thyrsoid with an elongated axis. |
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(15) |
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| 12 (11) |
Leaf blade densely yellow glandular on both surfaces |
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11 Clerodendrum luteopunctatum |
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Leaf blade without glands or glands only on 1 surface. |
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(13) |
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| 13 (12) |
Inflorescences capitate, ca. 5.5 cm; calyx lobes lanceolate, reflexed at anthesis |
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12 Clerodendrum ervatamioides |
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Inflorescences flat-topped, 7-16 cm; calyx lobes triangular-lanceolate, erect at anthesis. |
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(14) |
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| 14 (13) |
Leaf blade papery; corolla tube ca. 1 cm; calyx 3-4 mm |
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13 Clerodendrum cyrtophyllum |
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Leaf blade membranous; corolla tube 2-3 cm; calyx 6-7 mm |
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14 Clerodendrum kwangtungense |
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| 15 (11) |
Branchlets 4-angled, winged |
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5 Clerodendrum wallichii |
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Branchlets terete or slightly 4-angled, not winged. |
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(16) |
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| 16 (15) |
Inflorescences more than 15 cm; leaf blade usually membranous |
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9 Clerodendrum longilimbum |
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Inflorescences less than 15 cm; leaf blade usually papery. |
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(17) |
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| 17 (16) |
Leaf pairs with unequal blades and petioles |
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6 Clerodendrum garrettianum |
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Leaf pairs with equal blades and petioles. |
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(18) |
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| 18 (17) |
Leaves black when dry; inflorescences slightly pendulous, racemosely arranged thyrses; calyx lobes ovate-oblong |
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7 Clerodendrum henryi |
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Leaves green when dry; inflorescences thyrsoid cymes; calyx lobes triangular- lanceolate |
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8 Clerodendrum hainanense |
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| 19 (10) |
Cymes not crowded. |
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(20) |
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Cymes crowded. |
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(26) |
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| 20 (19) |
Inflorescences without a distinct axis. |
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(21) |
| + |
Inflorescences with a distinct axis. |
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(22) |
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| 21 (20) |
Leaf blade adaxially sparsely pubescent to subglabrous, abaxially puberulent; calyx densely pubescent; corolla lobes without glands |
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24 Clerodendrum colebrookianum |
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Leaf blade adaxially sparsely strigose, abaxially strigose only on veins; calyx puberulent; corolla lobes glandular outside |
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25 Clerodendrum kaichianum |
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| 22 (20) |
Inflorescences rounded |
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26 Clerodendrum villosum |
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Inflorescences flat topped. |
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(23) |
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| 23 (22) |
Calyx 3-6 mm, teeth awl-shaped or narrowly triangular. |
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(24) |
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Calyx 11-15 mm, teeth ovate-elliptic or ovate. |
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(25) |
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| 24 (23) |
Leaf blade papery, abaxially densely small glandular; calyx ca. 6 mm, teeth narrowly triangular |
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27 Clerodendrum kiangsiense |
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Leaf blade subleathery, abaxially without glands; calyx 3-4 mm, teeth awl-shaped |
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28 Clerodendrum mandarinorum |
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| 25 (23) |
Branchlets, petioles, and peduncles densely tomentose and glandular; stamens equal to or slightly longer than corolla tube; style slightly longer than stamens |
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29 Clerodendrum brachystemon |
| + |
Branchlets, petioles, and peduncles ± pubescent to subglabrous; stamens exserted; style shorter than stamens |
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30 Clerodendrum trichotomum |
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| 26 (19) |
Inflorescences axillary. |
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(27) |
| + |
Inflorescences terminal. |
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(28) |
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| 27 (26) |
Leaf blade subglabrous; bracts deciduous in fruit |
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15 Clerodendrum peii |
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Leaf blade densely pubescent; bracts persistent in fruit |
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16 Clerodendrum bracteatum |
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| 28 (26) |
Plants densely villous; calyx longer than fruit, without peltate glands |
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17 Clerodendrum canescens |
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Plants pilose or tomentose; calyx shorter than fruit, with peltate glands. |
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(29) |
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| 29 (28) |
Calyx and bracts pubescent with densely purplish red jointed glands |
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18 Clerodendrum tibetanum |
| + |
Calyx and bracts pubescent but not as above. |
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(30) |
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| 30 (29) |
Calyx lobes linear-lanceolate or lanceolate. |
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(31) |
| + |
Calyx lobes narrowly triangular, triangular, triangular-lanceolate, or ovate- lanceolate. |
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(32) |
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| 31 (30) |
Corolla lobes elliptic to ovate, ca. 10 mm |
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19 Clerodendrum chinense |
| + |
Corolla lobes obovate, 5-7 mm |
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20 Clerodendrum lindleyi |
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| 32 (30) |
Corolla tube shorter than or equal to calyx; leaf blade adaxially strigose, abaxially densely yellowish brown pubescent especially on veins |
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21 Clerodendrum yunnanense |
| + |
Corolla tube longer than calyx; leaf blade adaxially sparsely pubescent, abaxially sparsely glandular pubescent, subglabrous, or pubescent on veins. |
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(33) |
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| 33 (32) |
Bractlets lanceolate, ca. 1.8 cm; calyx 2-6 mm, lobes narrowly triangular to triangular, not longer than calyx tube |
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22 Clerodendrum bungei |
| + |
Bractlets linear, 0.5-0.8 cm; calyx 10-15 mm, lobes triangular-lanceolate, longer than calyx tube |
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23 Clerodendrum confine |
