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Published In: Species Plantarum 2: 637. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
General/Distribution: A large genus of c. 400 species in the tropical and sub-tropical Asia, Africa and America; represented here by 7 species, of these only one is wild.


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Shrubs or trees, rarely undershrubs or herbs, occasionally scandent. Leaves opposite-decussate, rarely verticillate, entire to dentate, rarely lobed, petiolate, exstipulate. Inflorescence cymose, axillary or terminal, cymes di- or trichotomous, panicled, corymbose or umbellate, rarely of solitary flowers. Flowers usually large, showy, white, yellowish, blue, violet or red, zygomorphic, bracteate. Calyx campanulate to somewhat tubular, truncate 5-toothed or fid, green to white or red coloured, persistent, often enlarged in fruit. Corolla-tube usually elongated, straight or curved; limb subequally 5-lobed, anterior one being the largest. Stamens 4, didynamous, epipetalous, alternating with corolla-lobes, curved above and much exserted; anthers ovate or oblong. Ovary 2-carpellary, incompletely 4-loculed with 1, pendulous ovule in each locule; style as long as the stamens and similarly curved with acutely 2-fid stigma. Fruit a fleshy drupe, somewhat 4-lobed, globose to obovoid, with hard or brittle endocarp, breaking into 4 or 2 pyrenes at maturity; seeds oblong.

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1 Stem solid. Leaves opposite. Corolla-tube less than 5 cm long (2)
+ Stem fistular. Leaves verticillate. Corolla-tube more than 5 cm long. (Cultivated) Clerodendrum indicum
2 (1) Leaves up to 5 cm long, 3 cm broad (3)
+ Leaves more than 5 cm long, and more than 3 cm broad (6)
3 (2) Corolla-tube 2-3.5 cm long (4)
+ Corolla-tube less than 2 cm long (5)
4 (3) Inflorescence of dichotomous axillary cymes, compactly arranged on young shoots to form a rounded terminal panicle. Bracts obovte-lanceolate. Corolla-tube pubescent outside, lobes 4-5 mm long (Wild)
+ Inflorescence of usually trichotomous cymes in the axils of uppermost leaves, not panicled. Bracts linear, Corolla-tube glabrous outside. Lobes c. 8 mm long. (Cultivated) Clerodendrum inerme
5 (3) Plants unarmed. Corolla-tube. c. 1 cm long. (Cultivated) Clerodendrum emirnense
+ Plants armed with spines (formed by base of petiole). Corolla-tube c. 1.5 cm long. (Cultivated) Clerodendrum aculeatum
6 (2) An erect shrub or undershrub. Leaves very broadly ovate to subrounded. Cymes corymbose. Calyx-tube glandular on margins, lobes as long as tube. (Cultivated) Clerodendrum philippinum
+ A climbing or suberect shrub. Leaves oblong or ovate-elliptic. Cymes umbellate. Calyx-tube without glands on marins, lobes longer than the tube. (Cultivated) Clerodendrum umbellatum
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