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This species is accepted, and its native range is Vietnam.

[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

Conservation
Known only from two collections. Both localities are close to a major city and disturbance of the habitat is likely. Estimated extent of occurrence is less than 200 km2. EN B1 ab(i,iii).
Distribution
Endemic to Vietnam.
Morphology General Habit
Erect perennial herb 0.5 - 1 m tall, rootstock woody
Morphology Leaves
Leaves thick, ovate or ovate-oblong, 20 - 50 x 12 - 25 mm, apex obtuse, base cuneate or attenuate, margin crenate-serrate, tomentose on both sides, hairs much denser beneath; petioles 10 - 30 mm long, tomentose
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens far exserted, more than twice as long as anterior corolla lip
Morphology Reproductive morphology Flowers Calyx
Calyx 3 - 5 mm long at anthesis; posterior lip obovate, acute at apex, glabrescent outside, pubescent inside, margin sometimes ciliate; anterior lip with teeth subulate, median lobes longest, lateral lobes slightly shorter than posterior; tube hispid-pubescent outside; fruiting calyx not seen
Morphology Reproductive morphology Flowers Corolla
Corolla pinkish-white, 12 - 15 mm long; posterior lip 3-lobed, midlobe broadest, emarginate; anterior lip ovate-oblong, concave, slightly longer than posterior; tube 8 - 10 mm long, dilated towards throat, slightly constricted above ovary, pubescent outside
Morphology Reproductive morphology Flowers Disc
Disc thick, anterior side well developed, obtuse at apex, much exceeding ovary.
Morphology Reproductive morphology Flowers Gynoecium Style
Style long exserted, much exceeding stamens, clavate and slightly cleft at apex
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, up to 10 cm long; axis hairy; bracts sessile, subtending 3 flowers, forming a small apical coma, not early caducous, broadly ovate, 2 - 3 mm long, shorter than pedicel in flower, acute or obtuse, adaxial glabrescent or pubescent, abaxial hispid-tomentose; pedicels 1.5 - 2 mm in flowers, tomentose
Morphology Stem
Stems quadrangular or round-quadrangular, woody at base, branched, pubescent below, tomentose above with patent or adpressed hairs, old stem with epidermis peeling
Note
This species is known only from the type and one other collection from a nearby area in Vietnam. No ecological information has been recorded. It appears closest to Orthosiphon rotundifolius but differs in habit, in the denser indumentum, in the cuneate or attenuate leaf base (not truncate or cordate) and in the more conspicuous lateral lobes of the anterior calyx lip. The bracts are not as quickly caducous as they are in 0. rotundifolius and are probably persistent; however no fruiting specimen has been seen.
Phenology
Flowering January - April.
Type
Vietnam, Ninh Thuan, Phanrang, Ca Na, 2 April 1923, Poilane 5997 (holotypus P!; isotypi 2 shts. P!).
Vernacular
Vietnamese: Trucquan Long.

Native to:

Vietnam

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

Date Reference Identified As Barcode Type Status
Apr 18, 2017 Nuraliev, M.S. et al. [1513], Vietnam K000939445

First published in Kew Bull. 60: 16 (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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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