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This species is accepted, and its native range is W. Thailand.


Suddee, S. & Paton, A. (2008). Teucrium scabrum (Lamiaceae), a new species from Thailand. Kew Bulletin 63: 675.

Thailand: Tak, Umphang Distr., Doi Hua Mot, 860 m, 5 Nov. 1998, Suddee & Puudjaa 1101 (holotypus BKF; isotypi K, TCD).
Morphology General Habit
Erect or ascending perennial rhizomatous herbs, 15 – 60 cm tall
Morphology Stem
Stems usually simple, rarely branched, round-quadrangular, puberulous to pubescent with patent glandular and eglandular hairs in the inflorescence axis and antrorse and eglandular on the stems below
Morphology Leaves
Leaves opposite and decussate or in whorls of 3 on some branches only, sometimes purplish beneath, petiolate; blades ovate or elliptic-ovate, 20 – 60 × 10 – 30 mm, apex acute or obtuse, base obtuse or shortly cuneate, margin crenate-dentate, scabrous on both sides, yellow sessile glands present on both sides but denser beneath and with papillate hairs, lateral veins 5 – 8, reticulation prominent beneath; petiole slender, up to 15 mm long, grooved above, pubescent to hispidulous
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, unbranched or with 2 lateral branches at base, 50 – 250 mm long; verticillasters 2-flowered, second, lax, 5 – 10 mm apart; bracts ovate to lanceolate, up to 12 mm long and 7 mm wide, base cuneate, scaberulous to scabrous, with scattered gland-tipped patent hairs on both sides, denser at base; pedicels slender, 3 – 5 mm long, hispidulous with shorter simple and longer gland-tipped patent hairs
Morphology Reproductive morphology Flowers Calyx
Calyx campanulate, 4 – 5 mm long at anthesis, 5 – 7 mm long in fruit, bilabiate, all lobes purplish at apex, hispidulous, with simple and gland-tipped patent hairs on both sides; lobes in a 1/2/2 arrangement, upper (posterior) lobe ovate, margins reflexed and decurrent on tube, lateral lobes ovate-triangular; lower (anterior) lobes lanceolate, acuminate, slightly longer than posterior; tube declinate, with 10 longitudinal veins, slightly constricted above base on upper side, hispidulous, with both simple and gland-tipped hairs, with scattered yellow sessile glands; throat pilose annulate
Morphology Reproductive morphology Flowers Corolla
Corolla light purple, exserted, 8 – 12 mm long, 1-lipped, 5-lobed; posterior lip absent; anterior lip with the middle lobe largest, orbicular-obovate, slightly concave, lateral anterior lobes triangular-ovate, acute, lateral posterior lobes lanceolate, acuminate, densely covered with gland-tipped hairs at apex; tube puberulous on anterior side inside, pubescent with scattered yellow sessile glands outside
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens didynamous, exserted, anterior pair longer; filaments white and puberulous at base, light purple and glabrous above; anthers dark purple, confluent
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary shallowly 4-lobed; stigma with subequal branches; disc equal, annular
Morphology Reproductive morphology Fruits
Nutlets dull brown, ovoid or subglobose, 0.8 – 1.2 mm in diameter, reticulately ridged, with scattered minute white sessile glands, attachment scar large.
SE Asia: Thailand
Open grassy slopes on degraded limestone hills; 480 – 900 m.
Flowering and fruiting August – November.
Estimated extent of occurrence of 200 km2, area of occupancy around 1 km2 at each recorded site and only known from 3 locations. In Doi Hua Mot the species is abundant but the habitat is becoming degraded by increased tourism which provides greater access for grazing by cattle. In Three Pagodas Pass only one small population of around 10 individuals was seen. EN B1, a, b (i, ii, iii).B2 a, b (i, ii, iii) (IUCN 2001).
Stem, leaf undersurface, peduncle, calyx and pedicel are usually purple in living material but this cannot be seen in dry specimens.

Native to:


Teucrium scabrum Suddee & A.J.Paton appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 2005 Suddee, S. [1101], Thailand K000881589 isotype

First published in Kew Bull. 63: 675 (2008 publ. 2009)

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.


Kew Bulletin

  • Harley, R. M., Atkins, S., Budantsev, A., Cantino, P. D., Conn, B., Grayer, R. J., Harley, M. M., De Kok, R., Krestovskaja, T., Morales, R., Paton, A. J., Ryding, O. & Upson, T. (2004). Labiatae. In J. W. Kadereit (ed.), The Families and Genera of Vascular Plants, VII. Flowering Plants. Dicotyledons: Lamiales (except Acanthaceae including Avicenniaceae): 167 – 275. Springer, Berlin.
  • IUCN (2001). IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission, IUCN, Gland, Switzerland and Cambridge, UK.
  • Kästner, A. (1989). Survey on taxonomical differentiation of the genus Teucrium. Biocosme. Mesogeen. 6: 63 – 76.
  • Murata, G. (1971). Contributions to the Flora of Southeast Asia IV: A List of Labiatae known from Thailand. SouthE Asian Stud. 8 (4): 489 – 517.

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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 and
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.