Premna odorata Blanco

First published in Fl. Filip.: 488 (1837)
This species is accepted
The native range of this species is Taiwan to Tropical Asia and N. Australia. It is a scrambling shrub or tree and grows primarily in the wet tropical biome.

Descriptions

de Kok, R. 2013. The genus Premna L. (Lamiaceae) in the Flora Malesiana area. Kew Bulletin 68: 55. DOI https://doi.org/10.1007/s12225-013-9433-5

Morphology General Habit
Small tree, shrub or liana, 1 – 10 (− 25) m tall, DBH 15 – 30 cm
Morphology General Bark
Bark smooth to flaky fissured, cream-grey to brownish ochre; sapwood cream to ochre
Morphology Twigs
Twigs velutinous when young, with or without ridge between petioles, densely brownish pubescent, base of young twigs without bracts
Morphology Leaves
Leaves opposite, ovate or obovate, rotundate to lanceolate, 2.5 – 16 (− 20) × (2 –) 4 – 10 (− 13.5) cm, apex emarginate to acuminate, base emarginate to cordate, margins entire to serrate, membranous or subchartaceous, pubescent, crushed leaves with disagreeable smell, yellowish green above, whitish below; hairs single, erect, covering both surfaces or rarely only on veins with few hairs on blade; glands present; venation often tri-veined from base, 3 – 7 main side veins, often tri-veined from the base; petioles 0.3 – 7 cm long, velutinous to sparsely hairy
Morphology Reproductive morphology Inflorescences
Inflorescences 4 – 15 cm long, corymbose cyme, puberulous; bracteoles linear, < 1 mm long
Morphology Reproductive morphology Flowers
Flowers: calyx usually two-lipped, 5-lobed; flowering calyx 1.5 – 3 mm long, densely pubescent, slightly accrescent; lobes sub-equal with the back ones slightly bigger then other three, 0.5 – 1 mm long, apex acute to rounded; lobes 0.5 – 1 mm long, apex rounded to sub-acute; fruiting 3 – 6 mm diam., variously lobed, patent
Morphology Reproductive morphology Flowers Corolla
Corolla tube 1 – 3 × 1 – 2 mm, (weakly) two-lipped, externally glabrous to sparsely hairy on lobes, yellow orange to pinkish-white or greenish-white, corolla (yellowish or pale) green or white, aromatic; central lobe of lower lip ovate-orbicular or oblong to spathulate, 1.5 – 2 × 0.8 – 2 mm, apex rounded to obtuse, glabrous, whitish green; other lobes 1 – 1.5 × 0.8 – 1.5 mm, apex rounded, glabrous
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 1 – 3 mm long, exserted, ± didynamous; anthers 0.2 – 0.5 mm long
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary globose, c. 1 mm diam., glabrous sometimes with a few hairs at apex, sometimes covered with glands; style 2 – 7 mm long, exserted, stigma 0.1 – 0.5 mm long, apex acute
Morphology Reproductive morphology Fruits
Fruit globose, 3 – 5 × 3 – 4 mm diam., glabrous, sometimes with a few hairs at apex, sometimes covered with glands, black to purple when mature, endocarp smooth; seeds four and equally developed when mature.
Distribution
Sri Lanka and East coast of India to South China and south to Papua New Guinea and Australia’s Northern Territory and Queensland. Rarely collected in Peninsular Malaysia, Sumatra, Borneo, Java, Lesser Sunda Islands, Maluku and New Guinea (see Map 4).
Ecology
Usually common in primary and secondary vegetation. Soil: clay, sometimes over limestone or ultra-basic rock; 25 – 1800 m.
Conservation
Least concern (LC).
Phenology
Flowering all year round; fruiting from March to November.
Vernacular
Indonesia, Java: Sengkěl (Sundanese language), Sumatra: Waits-kedi (Lampong language), Halmahera: Somoko (Tobaro language), Timor: Kleob katoe. Philippines: Alagao, Alagbaguin or Alagaw-bagin (Tagalong language); Uradgao (Viscaya language); Karimog (Maranao language). Papua New Guinea, New Britain: Kua.
Note
This species is often compared with Premna lucidula Miq. from Java (Ridley 1923: 618), from which it differs in being densely hairy on the leaves and having a petiole covered with soft hairs, rather than having glabrous leaves and petiole with hairs in the channel only.
[KBu]

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Uses

Use
In Peninsular Malaysia, the roots and leaves are used for medicinal purposes (Burkill 1935).
[KBu]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0
  • Herbarium Catalogue Specimens

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Bulletin

    • Kew Bulletin
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0