Skip to main content
This genus is accepted, and its native range is Tropical & Subtropical Old World.
Isodon japonicus var. glaucocalyx

[LKGF]

Harley, R.M. et al. (2004). Labiatae, in The Families and Genera of Vascular Plants (K. Kubitzki, ed. in chief) VI: 167-275. Springer-Verlag, Berlin, Heidelberg, New York.

Morphology General Habit
Shrubs or herbs
Morphology Leaves
Leaves simple, opposite, rarely ternate
Morphology Reproductive morphology Inflorescences
Inflorescence thyrsoid with cymes pedunculate, bracteate, bracteolate, 3- to several-flowered
Morphology Reproductive morphology Inflorescences Bracts
Bracts persistent, not coloured, smaller than leaves
Morphology Reproductive morphology Inflorescences Bracteoles
Bracteoles small, usually linear
Morphology Reproductive morphology Flowers Calyx
Calyx campanulate, funnel-shaped, or tubular and sometimes slightly constricted or rarely curved at throat, actinomorphic or 2-lipped, 5-lobed (3/2 or regular), lobes lanceolate to deltoid, posterior never decurrent, throat open, glabrous
Morphology Reproductive morphology Flowers Corolla
Corolla strongly 2-lipped, 5-lobed (4/1), white, blue, pink or purplish, posterior lip ascending or reflexed, 4-lobed with lobes equal or rarely median more shallowly lobed, anterior lip horizontal, cucullate, corolla-tube straight or geniculate, saccate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, held within, or more rarely exceeding the anterior lip, posterior pair attached near base of corolla or between base and midpoint, usually with hairs, anterior pair attached between midpoint of corolla and throat, often with hairs
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma-lobes diverging
Morphology Reproductive morphology Flowers Disc
Disc 4-lobed with anterior lobe slightly larger, lobes alternating with nutlets
Morphology Reproductive morphology Fruits
Nutlets ovoid, rarely conical with a flattened base, glabrous, sometimes with hairs or glands, mucilaginous or not, areole small, inconspicuous.
Note
2n = 24, 42.  Around 100 species
Distribution
Tropical Asia with two species in Africa.

[KBu]

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

Morphology General Habit
Annual or perennial herbs or undershrubs
Morphology Leaves
Leaves membranous to chartaceous, usually serrate or sometimes serrate-crenate, lower pairs petiolate, upper pairs usually sessile
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens exserted or included in anterior corolla lip; insertion of anterior pair varying from above the middle of corolla tube to the base of anterior corolla lip, glabrous or only slightly pubescent at base; posterior pair inserted near the base of corolla tube, sparsely or densely villous at base
Morphology Reproductive morphology Flowers Calyx
Calyx campanulate or tubular-campanulate, straight or declinate, subequally 5-toothed or bilabiate with posterior lip 3-lobed and anterior lip 2-lobed; tube 10-nerved, usually twice or more as long as teeth, without spur at anterior base
Morphology Reproductive morphology Flowers Corolla
Corolla with posterior lip subequally 4-lobed, usually pubescent with sessile glands on back; anterior lip concave or flattened, glabrous inside, usually pubescent with sessile glands outside; tube tubular, straight or declinate, usually gibbous on posterior side near base
Morphology Reproductive morphology Flowers Disc
Disc with anterior side well or slightly developed
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary glabrous
Morphology Reproductive morphology Flowers Gynoecium Style
Style shortly bifid with subequal branches, shorter or longer than stamens
Morphology Reproductive morphology Fruits
Nutlets oblong, ovoid or ellipsoid, smooth or minutely tuberculate, producing mucilage when wet or not.
Morphology Reproductive morphology Inflorescences
Inflorescence terminal and axillary, usually branched, forming a small or large panicle; cymes sessile or pedunculate, lax or dense, few- to many-flowered; bracts with lower pairs similar to leaves, gradually reduced in size upwards, persistent; bracteoles present, short, caducous or persistent
Morphology Stem
Stems sometimes woody at base, quadrangular or round- quadrangular, glabrous or pubescent and usually hollow inside
Note
Plectranthus L'Her. sect. Pyramidium Benth. was first published in Wall., Pl. Asiat. Rar. 2: 17 (1830), not in Labiat. Gen. Spec.: 44 (1832). Rabdosiella calycinus (Benth.) Codd, the type species of Rabdosiella, is actually a Plectranthus (Ryding 1993b).
Type
Lectotype species: Isodon rugosus (Wall. ex Benth.) Codd (Plectranthus rugosus Wall. ex Benth.).

[FTEA]

Lamiaceae (Labiatae), A.J. Paton, G. Bramley, O. Ryding, R.M. Polhill, Y.B. Harvey, M. Iwarsson, F. Willis, P.B. Phillipson, K. Balkwill, C.W. Lukhoba, D.F. Otieno, & R.M. Harley. Isodon, RM Polhill. Flora of Tropical East Africa. 2009

Morphology General Habit
Herbs or shrubs
Morphology Stem
Stems quadrangular, with simple sometimes septate hairs, glandular hairs and sessile glands
Morphology Leaves
Leaves undivided, opposite, rarely ternate, usually petiolate
Morphology Reproductive morphology Inflorescences
Inflorescences thyrsoid, extended with cymes pedunculate, dichasial lax, elsewhere sometimes more congested; bracts leaf-like, smaller above; bracteoles present
Morphology Reproductive morphology Flowers Calyx
Calyx campanulate to tubular, accrescent, sometimes becoming slightly constricted and curved at throat, subequally 5-toothed, sometimes slightly 2-lipped, the posterior lip with 3 teeth, the anterior with 2 teeth
Morphology Reproductive morphology Flowers Corolla
Corolla white, blue, pink or purplish, 2-lipped; tube straight or geniculate, ± saccate to spurred at base, ± parallelsided distally; posterior lip short, recurved or reflexed, 4-lobed; anterior lip flat to boat-shaped, ± horizontal
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, declinate, posterior pair attached near base of corolla, anterior pair attached in upper part of corolla tube
Morphology Reproductive morphology Flowers Disc
Disk 4-lobed, with anterior lobe slightly larger
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary deeply 4-lobed; style gynobasic, exserted, bifid with lobes short, equal and diverging
Morphology Reproductive morphology Fruits
Nutlets ovoid to ellipsoid or rarely conical, glabrous, mucilaginous when wetted or not; attachment scar basal, small.

Native to:

Afghanistan, Amur, Angola, Assam, Bangladesh, Borneo, Burundi, Cameroon, China North-Central, China South-Central, China Southeast, East Himalaya, Ethiopia, Gulf of Guinea Is., India, Japan, Jawa, Kenya, Khabarovsk, Korea, Laos, Lesser Sunda Is., Malawi, Manchuria, Myanmar, Nepal, Nigeria, Oman, Pakistan, Philippines, Primorye, Rwanda, Saudi Arabia, Sierra Leone, Sri Lanka, Sudan, Sulawesi, Sumatera, Taiwan, Tanzania, Thailand, Tibet, Uganda, Vietnam, West Himalaya, Zambia, Zaïre, Zimbabwe

Isodon (Schrad. ex Benth.) Spach appears in other Kew resources:

First published in Hist. Nat. Vég. 9: 162 (1838)

Accepted by

  • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

Literature

Flora of Tropical East Africa

  • Bothalia 15: 7–9 (1984)
  • Hist. Nat. Vég. Phan. 9: 162 (1840)
  • J. Arn. Arbor. 69: 289–400 (1988)
  • K.B. 53: 723–731 (1998)
  • K.B. 58: 487 (2003)
  • Kubitzki, Fam. Gen. Vasc. Pl. 7: 256 (2004)
  • Pl. Syst. Evol. 185: 91–97 (1993)
  • Taxon 17: 239 (1968)

Lamiaceae Key Genus Fact Sheets

  • Amethystanthus Nakai, Bot. Mag. (Tokyo) 48: 785 (1934).
  • Dielsia Kudô, Mem. Fac. Sci. Taihoku Imp. Univ. 2: 143 (1929), nom. illeg.
  • Harley RM, Atkins S, Budantsev AL, Cantino PD, Conn BJ, Grayer R, Harley MM, de Kok RPJ, Krestovskaja T, Morales R, Paton AJ, Ryding O, and Upson T. 2004. Labiatae, in The Families and Genera of Vascular Plants (K. Kubitzki, ed. in chief) VI: 167-275. Sp
  • Homalocheilos J.K.Morton, J. Linn. Soc., Bot. 58: 249 (1962).
  • Isodon (Benth.) Schrader ex Spach, Hist. Nat. Vég. 9: 162 (1840)
  • Li, J. Arnold Arbor. 69: 289-400 (1988), rev.
  • Paton & Ryding, Kew Bull. 53: 723-731 (1998).
  • Plectranthus L'Hér. sect. Amethystoides Schrad. ex Benth. (1832).
  • Plectranthus L'Hér. sect. Isodon Schrad. ex Benth. (1832).
  • Plectranthus L'Hér. sect. Melissoides Schrad. ex Benth. (1832).
  • Plectranthus L'Hér. sect. Pyramidatum Schrad. ex Benth. (1832).
  • Rabdosiella Codd, Bothalia 15: 9 (1984).
  • Skapanthus C.Y.Wu & H.W.Li, Acta Phytotax. Sin. 13: 77 (1975).

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

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

Lamiaceae Key Genus Fact Sheets
Nina Davies, Gemma Bramley and Don Kirkup, Royal Botanic Gardens, Kew
http://creativecommons.org/licenses/by/3.0