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This species is accepted, and its native range is Himalaya to Hainan and Indo-China.
A specimen from Kew's Herbarium

[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
Tropical Africa, India, Himalaya, Burma, South China, Cambodia, Laos, Thailand & Vietnam.
Ecology
In savannas, disturbed forest, open areas in dry deciduous dipterocarp forest, mixed deciduous forest, Pine-Dipterocarp forest; from near sea level - 1100 m.
Morphology General Habit
Erect or ascending perennial herb, up to 1 m tall, rootstock woody, with tuberous roots
Morphology Leaves
Leaves varying from sessile to petiolate, sometimes congested at stem base, chartaceous, ovate, oblong, ovate-oblong, ovate- lanceolate or elliptic ovate, 25 - 150 x 10 - 60 mm, apex obtuse or acute, base conspicuously cuneate or attenuate and decurrent on petiole, margin serrate or crenate, puberulous to pubescent with sessile glands on both sides; petioles up to 6 cm long, pubescent
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens included under anterior corolla lip, anterior slightly longer
Morphology Reproductive morphology Flowers Calyx
Calyx 5 - 7 mm long at anthesis, 8 - 12 mm long in fruit; posterior lip orbicular, ovate or obovate, rounded, acute or apiculate at apex, decurrent on tube, glabrous to pubescent on both sides in flower and fruit; anterior lip with subulate teeth, median teeth longest, lateral ± equal in length to the posterior; tube pubescent outside, sometimes with gland-tipped hairs
Morphology Reproductive morphology Flowers Corolla
Corolla purple, 8 - 22 mm long, usually more than 3 times as long as calyx; posterior lip 4-lobed; anterior obovate, flat or slightly concave, ± equal in length to the posterior; tube 7 - 18 mm long, slightly dilated towards throat, straight or incurved, pubescent outside
Morphology Reproductive morphology Flowers Disc
Disc with anterior side well-developed, obtuse or truncate at apex, equal or slightly exceeding ovary
Morphology Reproductive morphology Flowers Gynoecium Style
Style included, never exceeding the anterior stamens, clavate-capitate and slightly cleft at apex
Morphology Reproductive morphology Fruits
Nutlets brown, ellipsoid, 1.5 - 2 mm long, minutely reticulate, with or without brown scales, sometimes producing mucillage when wet.
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, up to 35 cm long; axis pubescent, with or without gland-tipped hairs; bracts sessile, subtending 2 - 3 flowers, forming a small apical coma, persistent, ovate or ovate- lanceolate, occasionally obovate, up to 8 mm long, longer or shorter than pedicel in flower, usually shorter in fruit, rarely longer, acute or acuminate, adaxial glabrous or glabrescent, abaxial pubescent; pedicels 2 - 5 mm long at anthesis, 4- 5 mm long in fruit, pubescent with or without gland-tipped hairs
Morphology Stem
Stems quadrangular or round-quadrangular, usually with many stems arising from old rootstock, pubescent, old stem glabrous or glabrescent
Note
A very variable species which has long been divided into several varieties, nearly all occurring in the Indian region. The leaves vary from sessile to petiolate, as well as in size and hairiness; corolla length also varies. There are no clear discontinuity that can be used to subdivide this species. The Thai and Indo-Chinese specimens display less variation when compared to those from India and Burma. Orthosiphon incurvus is supposed to differ from O. rubicundus in its longer corolla and longer petioles, but as a whole the characters show no discontinuity between the two species. Don (1825) also stated 'longe petiolatis' in the original description of O. rubicundus. Based on the reasons cited above, O. incurvus is treated as a synonym of O. rubicundus, in agreement with Clement (1999). The type from Nepal, Buch.-Ham. s.n., with 'Ocymum rubicundum' Hamilton MSS., as described in the original publication has not yet been found. The specimen Wall. Cat. 2721A in the Wallich Herbarium, collected from Nepal, matches the original description and is here chosen as the neotype. The material originally cited under Orthosiphon rubicundus (D. Don) Benth. var. rigidus Benth. contained the specimen (Wall. Cat. 2721E) which is in fact Orthosiphon pallidus Benth. As the protologue and remaining specimens suggest O. rubicundus, the name var. rigidus is lectotypified here with Wall. Cat. 2721D (with 'Ocymum rigidum' Hb. Ham. MSS.) and treated as a synonym.
Phenology
Flowering and fruiting February - October.
Type
Nepal, May 1820, Wall. Cat. 2721A (K-W!, neotype).
Vernacular
Thai: Hom Kra Tai (Phetchabun), Yah Hang Sue Mong (Loei), Keng Ka Noi (Mukdahan), Nuat Sua Kio (Loei), Sah Pak E Tu (Aran Prathet). Vietnamese: Trucquan Do.

[FWTA]

Labiatae, J. K. Morton. Flora of West Tropical Africa 2. 1963

Morphology General Habit
An attractive erect aromatic perennial herb about 11/2-2 ft. high
Morphology Reproductive morphology Flowers
Flowers white or pink
Morphology Reproductive morphology Inflorescences
Inflorescence usually pink
Morphology Reproductive morphology Flowers Calyx
Calyx accrescent
Ecology
Common in savanna woodland.

Native to:

Assam, Bangladesh, Cambodia, China South-Central, East Himalaya, Hainan, India, Laos, Myanmar, Nepal, Thailand, Vietnam, West Himalaya

Orthosiphon rubicundus (D.Don) Benth. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Polhill, R. [915], Kenya 22973.000
Mathew, B. [6077], Kenya 40070.000
Onochie, C. [35375], Nigeria 5525.000
Wallich, N. [s.n.], Myanmar K000911656 syntype
Strachey [1], India K000911660
Wallich, N. [s.n.] K000911657
Edgeworth, M. P. [5] K000911658
s.coll. [2722] K000911659 isotype
Wallich, N. [s.n.], Nepal K000911655 syntype
Wallich, N. [Cat. no. 2721], Nepal K001116939
Wallich, N. [s.n.] K000911653 syntype
Wallich, N. [Cat. no. 2721], Nepal K001116940
Wallich, N. [2721] K000911654
Blinkworth, R. [Cat. no. 2721], India K001116941
s.coll. [s.n.] K000911661

First published in N.Wallich, Pl. Asiat. Rar. 2: 14 (1830)

Accepted by

  • Akoègninou, A., van der Burg, W.J. & van der Maesen, L.J.G. (eds.) (2006). Flore Analytique du Bénin: 1-1034. Backhuys Publishers.
  • Brunel, J.F., Hiepo, P. & Scholz, H. (eds.) (1984). Flore Analytique du Togo Phanérogames: 1-751. GTZ, Eschborn.
  • Calane da Silva, M., Izdine, S. & Amuse, A.B. (2004). A Preliminary Checklist of the Vascular Plants of Mozambique: 1-184. SABONET, Pretoria.
  • Fischer, E., Rembold, K., Althof, A. & Obholzer, J. (2010). Annotated checklist of the vascular plants of Kakamega forest, Western province, Kenya Journal of East African Natural History 99: 129-226.
  • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Khanam, M. & Hassan, M.A. (2008). Lamiaceae Flora of Bangladesh 58: 1-161. Bangladesh National Herbarium, Dhaka.
  • Suddee, S., Paton, A.J. & Parnell, J.A.N. (2005). Taxonomic Revision of the tribe Ocimeae Dumort (Lamiaceae) in continental South East Asia III. Ociminae Kew Bulletin 60: 3-75.

Literature

Flora of West Tropical Africa

  • in Wall. Pl. As. Rar. 2: 14 (1831).

Kew Backbone Distributions

  • Khanam, M. & Hassan, M.A. (2008). Lamiaceae Flora of Bangladesh 58: 1-161. Bangladesh National Herbarium, Dhaka.

Flora of West Tropical Africa
Flora of West Tropical Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens
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 Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. 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 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