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


Suddee, S., A. J. Paton, & Parnell, J. (2004). A Taxonomic Revision of Tribe Ocimeae Dumort. (Lamiaceae) in Continental South East Asia II. Plectranthinae. Kew Bulletin, 59(3), 379-414. doi:10.2307/4110950

Known only from one locality near a village. Although within a wildlife sanctuary, disturbance is likely. A recent field trip to the area in October 1998 failed to find any populations of this species. CR B1+2 ab(i,ii,iii).
Endemic to Thailand.
Open limestone area in deciduous forest with much bamboo; 225 m.
Morphology General Habit
Erect annual herb up to 1.5 m tall
Morphology Leaves
Leaves membranous, cordate, very large, 220 - 250 x 160 - 200 mm, apex acute, base cordate, margin crenate, puberulous above, glabrous with prominent veins beneath, sessile glands obscure
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens shortly united at base, included in anterior corolla lip
Morphology Reproductive morphology Flowers Calyx
Calyx tubular-campanulate, 3 mm long at anthesis, tubular, 6 - 8 mm long in fruit, entirely glabrous; posterior lip ovate, acute at apex, margin entire, decurrent on tube, with prominent nerves on both sides; anterior lip with median teeth lanceolate, subequal to posterior lip, lateral teeth triangular-ovate with prominent nerves, slightly shorter than median teeth; tube 10-nerved, slightly constricted at throat, obscurely gibbous at anterior base
Morphology Reproductive morphology Flowers Corolla
Corolla whitish-violet, 9 - 10 mm long; posterior lip with margin of lobes minutely denticulate, glabrescent outside, median lobes rounded, lateral lobes obtuse at apex; anterior lip ovate-oblong, 4- 4.5 mm long, concave, pubescent outside, pubescent at apex inside; tube 4- 5 mm long, weakly sigmoid beyond calyx, gradually dilated towards throat, glabrescent outside
Morphology Reproductive morphology Flowers Disc
Disc with anterior side thick, truncate or shallowly emarginate at apex, exceeding ovary
Morphology Reproductive morphology Flowers Gynoecium Style
Style shortly bifid at apex with obtuse lobes, equal or longer than stamens but not exceeding anterior corolla lip
Morphology Reproductive morphology Fruits
Nutlets (immature) brown, narrowly oblong, 2 mm long.
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, much branched, up to 30 cm long; axis shortly pubescent; verticils 5 - 15 mm apart, clearly interrupted; cymes sessile, 2 - 3-flowered; bracts sessile, caducous, broadly ovate, up to 6 x 6 mm, acute, glabrous; pedicels 1 mm long at anthesis, 2 mm long in fruit, shortly pubescent
Morphology Stem
Stems hollow, rooting at nodes below, quadrangular, glabrous, branched
A very distinctive species with, large membranous cordate leaves, posterior corolla lobes with minutely denticulate margins, and a glabrous fruiting calyx. Only found once in the western forest complex of Thailand.
Flowering & fruiting October.
Kanchanaburi, Thung Yai Naresuarn Wildlife Sanctuary, Ban Saneh Pawng, Lai Wo Subdistr., 225 m, 7 Oct. 1993, Maxwell 93-1156 [holotypus CMU! (Herbarium, Chiang Mai University, Thailand); isotypus L!].

Native to:


Coleus gigantifolius (Suddee) Suddee appears in other Kew resources:

First published in PhytoKeys 129: 49 (2019)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. Scientific Data 8: 215.

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at and
© Copyright 2017 World Checklist of Selected Plant Families.

Kew Bulletin
Kew Bulletin

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.