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

[KBu]

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

Conservation
Populations from Saraburi may be threatened by limestone mining for cement works. Other populations are in protected areas. Least concern, while these areas remain protected.
Distribution
Endemic to Thailand.
Ecology
Open limestone rocks in deciduous or evergreen forest; 50 - 500 m.
Morphology General Habit
Erect annual herbs up to 0.5 m tall
Morphology Leaves
Leaves subfleshy, broadly ovate, 25 - 60 x 15 - 35 mm, apex acute or acuminate, base truncate or cuneate, margin serrate-crenate, puberulous on both sides, dotted with minute glands beneath, veins subprominent both sides; petioles slender, 5 - 25 mm long, puberulous
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens clearly united for 1/3 of their length, included in anterior corolla lip
Morphology Reproductive morphology Flowers Calyx
Calyx tubular, 2 mm long at anthesis, 8 - 9 mm long in fruit; posterior lip ovate, acute at apex, margin entire or sparsely ciliate, decurrent on tube, glabrous inside, glabrous or sparsely pubescent, with sessile glands outside; anterior lip with teeth sometimes ciliate at margin, median teeth lanceolate, subequal to posterior, lateral teeth obovate-oblong, equalling or slightly shorter than the median teeth; tube 10- nerved, pubescent with simple and gland-tipped patent hairs and with sessile glands, slightly constricted at throat, with a rounded spur at anterior base
Morphology Reproductive morphology Flowers Corolla
Corolla blue, 7 - 10 mm long; posterior lip subequally lobed, lobes obtuse at apex, glabrous or glabrescent on back; anterior lip ovate-oblong, 3 - 4 mm long, slightly concave, pubescent on both sides at apex, with sessile glands outside; tube 4- 6 mm long, sigmoid below the middle, gradually dilated towards base, widely expanded at throat, slightly pubescent outside
Morphology Reproductive morphology Flowers Disc
Disc with anterior side thick, obtuse at apex, slightly exceeding ovary
Morphology Reproductive morphology Flowers Gynoecium Style
Style shortly bifid with subequal branches, ± the same length as anterior stamens
Morphology Reproductive morphology Fruits
Nutlets brown or black, ovoid or ellipsoid, c. 1.5 mm long, smooth, producing mucilage when wet.
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, up to 15 cm long, simple or branched, lateral branches up to 7 cm long; axis pubescent with simple and gland-tipped patent hairs and with sessile glands; verticils 5 - 12 mm apart, clearly interrupted; cymes sessile, 3-flowered; bracts sessile, caducous, ovate, 4 - 7 mm long, acute, ciliate at margin, pubescent; pedicels 1 - 2 mm long at anthesis, 2 - 3 mm long in fruit, pubescent with short patent hairs
Morphology Stem
Stems succulent, quadrangular, puberulous
Note
The fruiting calyx, which is creamy-white when dry, is very distinctive. This species is closely related to Plectranthus helferi and P. gigantifolius in calyx shape but differs from the former in having the upper and lateral teeth of the calyx with entire, rather than denticulate margins, and from the latter in having much smaller leaves, a pubescent rather than glabrous calyx, and entire rather than denticulate posterior corolla lobes. The species is restricted to limestone habitats in the Western, Central and North- Eastern parts of Thailand. It occurs near the Thai- Burmese and Thai-Laos borders, but so far there has been no record from either Burma or Laos.
Phenology
Flowering & fruiting September - December.
Type
Thailand, Kanchanaburi, Salak Phrae W.S., Khao Tab Tao, 480 m, 29 Sept. 1998, Suddee et al 868 (holotypus BKF!; isotypi K!, TCD!).

Native to:

Thailand

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

First published in PhytoKeys 129: 14 (2019)

Accepted by

  • Paton, A.J., Mwanyambo, M. Govaerts, R.H.A., Smitha, K., Suddee, S., Phillipson, P.B., Wilson, T.C., Forster, P.I. & Culham, A. (2019). Nomenclatural changes in Coleus and Plectranthus (Lamiaceae): A tale of more than two genera PhytoKeys 129: 1-158.

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