Isodon ternifolius (D.Don) Kudô

First published in Mem. Fac. Sci. Taihoku Imp. Univ. 2: 140 (1929)
This species is accepted
The native range of this species is Arabian Peninsula, Himalaya to S. China. It is a subshrub or shrub and grows primarily in the subtropical biome.

Descriptions

Suddee, S., A. J. Paton, & Parnell, J. (2004). A Taxonomic Revision of Tribe Ocimeae Dumort. (Lamiaceae) in Continental South East Asia I. Introduction, Hyptidinae & Hanceolinae. Kew Bulletin, 59(3), 337-378. doi:10.2307/4110949

Type
Nepal, Narainhetty, Buch.-Ham. s.n. (holotype BM!).
Morphology General Habit
Erect undershrub or shrub up to 4 m tall
Morphology Stem
Stems woody at base, branched or not, hollow, round-quadrangular with several longitudinal shallow grooves, villous- tomentose
Morphology Leaves
Leaves sessile or shortly petiolate, in whorls of 3 - 4 or opposite and whorled on the same plant, chartaceous or coriaceous, lanceolate, ovate- lanceolate or elliptic-lanceolate, 20 - 140 x 12 - 40 mm, apex acute, margin serrate, base cuneate, rugose and pilose above, villous-tomentose beneath, veins prominent beneath; petioles 0 to 5 mm long, tomentose
Morphology Reproductive morphology Inflorescences
Inflorescence terminal and axillary, composed of several dense villous-tomentose spike- like branches, forming a panicle; cymes dense, many- flowered, flowers always lying adjacent to axis of cyme; bracts ovate to narrowly so, adaxially rugose or pilose, abaxially tomentose; bracteoles linear or linear- lanceolate, 1 - 2 mm long, pubescent, caducous or persistent; pedicels 1 - 3 mm long at anthesis, 2 - 4 mm long in fruit, pubescent
Morphology Reproductive morphology Flowers Calyx
Calyx campanulate, c. 2 mm at anthesis, densely whitish-villous, tubular, 3- 5 mm long in fruit, inconspicuously 2-lipped; teeth minute, subequal, ovate-triangular, acute at apex; tube straight, 10-nerved, often grooved between longitudinal nerves, pubescent to villous, with sessile glands outside, not gibbous at anterior base
Morphology Reproductive morphology Flowers Corolla
Corolla white with purple dots on upper lip, declinate, 6- 7 mm long; posterior lip subequally 4-lobed, lobes rounded or obtuse at apex, densely villous, with sessile glands on back; anterior lip ovate-orbicular, 3 - 4 mm long, longer than posterior, concave, glabrous inside, glabrous at margin outside otherwise villous with sessile glands; tube 2 - 2.5 mm long, tubular, abruptly expanded above the narrow base and conspicuously gibbous on posterior side, pubescent on anterior side inside, pubescent, with or without sessile glands outside
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens included in anterior corolla lip; anterior pair inserted around the base of anterior corolla lip, pubescent at base; posterior pair inserted near the base of corolla tube, pubescent at base
Morphology Reproductive morphology Flowers Gynoecium Style
Style not or occasionally exceeding anterior corolla lip
Morphology Reproductive morphology Flowers Disc
Disc with anterior side slightly developed, not exceeding ovary, the rest annular
Morphology Reproductive morphology Fruits
Nutlets brown, triangular- oblong, 2 - 2.5 mm long, smooth, conspicuously trigonous on upper half, acute at apex, producing mucilage when wet.
Ecology
Open places in hill evergreen forest, dipterocarp-oak forest, deciduous forest, edges of evergreen forest; 400 - 2200 m.
Phenology
Flowering October - February, fruiting December - April.
Distribution
India, Nepal, Bhutan, South China, Burma, Laos, Thailand and Vietnam.
Vernacular
Burmese: Myatnaw (Shan), Hwa Lam Lau. Thai: Bo Sou Hao Vo (Chiang Mai), Se' Ma' (Chiang Rai). Vietnamese: Cay trong Tua.
[KBu]

Uses

Use
In Thailand this species is used for decoction and ablutions. Water from the boiled rootstock is drunk as a cure for jaundice. In Burma the roots are used against itching.
[KBu]

Sources

  • 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 Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 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 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0