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This species is accepted, and its native range is Indo-China.

[KBu]

Suddee, S., A. J. Paton, & Parnell, J. (2005). Taxonomic Revision of Tribe Ocimeae Dumort. (Lamiaceae) in Continental South East Asia III. Ociminae. Kew Bulletin, 60(1), 3-75. Retrieved from http://www.jstor.org/stable/4110885

Distribution
Vietnam, Thailand.
Ecology
Dry deciduous dipterocarp forest, evergreen forest, mixed deciduous forest, bamboo forest; from near sea level - 1000 m.
Morphology General Habit
Tall herbs or undershrubs to 4 m tall
Morphology Leaves
Leaves membranous to chartaceous, the middle pairs of leaves on branch always largest, all pairs distinctly petiolate, ovate, 30 - 130 x 25- 120 mm, apex acute, base cordate or truncate, margin crenate-serrate, pubescent to tomentose with sessile glands on both sides, sometimes purple on veins beneath; petioles up to 6 cm long, pubescent
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens exserted, anterior slightly longer, twice as long as anterior corolla lip
Morphology Reproductive morphology Flowers Calyx
Calyx campanulate, 3 - 6 mm long at anthesis, 6- 9 mm long in fruit; posterior lip orbicular, rounded or slightly emarginate at apex, glabrous both sides or slightly pubescent inside, decurrent on tube; anterior lip with median teeth subulate, ± equal in length to the posterior, lateral teeth minute, apiculate or shortly cuspidate; tube pubescent with yellow sessile glands, denser at tube base
Morphology Reproductive morphology Flowers Corolla
Corolla purple, 18 - 25 mm long; posterior lip 3- lobed, erect, midlobe entire, rarely emarginate; anterior lip concave, 8 - 10 mm long, ± equal in length to the posterior; tube straight, 8- 10 mm long, dilated at throat, pubescent with sessile glands outside
Morphology Reproductive morphology Flowers Disc
Disc with anterior side well-developed, truncate or obtuse at apex, much exceeding ovary
Morphology Reproductive morphology Flowers Gynoecium Style
Style exceeding anterior stamens, clavate and cleft at apex
Morphology Reproductive morphology Fruits
Nutlets brown, globose or ellipsoid, 1 - 1.5 mm long, minutely tuberculate or reticulate, with or without black dots, producing mucilage when wet or not.
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, up to 25 cm long, sometimes branched at base; axis pubescent with short adpressed hairs; bracts sessile, subtending 3 flowers, coma usually conspicuous, caducous, ovate or lanceolate, up to 8 mm long, cuspidate or acuminate, occasionally 3-lobed at apex, adaxial glabrous or glabrescent, abaxial pubescent, rarely with sessile glands; pedicels 3- 4 mm long in flowers, 4- 5 mm long in fruit, pubescent
Morphology Stem
Stems quadrangular, pubescent
Note
Plants of this species are distinct in the genus because of their undershrub or shrub-like habit. The leaves are ovate and usually tomentose. The bracts on the top of the inflorescence are very conspicuous and soon caducous. Though originally described as having the posterior lip of corolla 4-lobed, i. e. weakly emarginate, the specimens studied, including the type, only show a 3-lobed form; emarginate median lobes are only occasionally found. The species has never been recorded from the Malesian region with the exception of two sheets of Horsfield Lab 27 at K which are definitely O. rotundifolius. Though the Horsfield label has 'Java' on it, and this is consistent with his collection itinerary, the lack of specimens from Peninsula Malaysia suggests that these two sheets may have been mislabelled and may not, in fact, be from Java.
Phenology
Flowering and fruiting May - February.
Type
Vietnam, Ba Ria, June 1867, Pierre Lab. 7 (holotypus P!; isotypi 6 shts. P!).
Vernacular
Thai: Jeing Dong (Loei), Bang Rak Paa (Prachuap Khiri Khan).

Native to:

Thailand, Vietnam

Orthosiphon rotundifolius Doan ex Suddee & A.J.Paton appears in other Kew resources:

First published in Kew Bull. 60: 14 (2005)

Accepted by

  • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

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© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

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Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0