Dicotyledonous Family: Lamiaceae

Systematic position

Bentham and Hooker placed it in the sub-class Gamopetalae, the series Bicarpellate and Cohort Gentianales. According to Engler, it belongs to the sub-class Metachlamydeae, the sub-order Tubiflorae, the sub-order Verbenineae. Hutchinson places it under the order Lamiales belonging to the phylum Herbaceae.


The family contains about 200 genera and 3200 species. They are mostly cosmopolitan, the chief centre of distribution being the Mediterranean region.

General  characters


Mainly annual or perennial herbs sometimes shurbs rarely trees, stem squre with sweet aromatic oils, hairy.


Simple, opposit, exstipulate, entire.


Dichasial cyme or verticillaster.


Complete, Zygomorphic, bisexual and hypogynous.


Sepals 5, gamosepalous, imbricate, tubular or bell shaped persistent.


petals 5, gamopetalous imbricate, bilabiate, upper 2 lipped lower 3, usually differentiated into tube and limb.


Stamens 4, with an occasional fifth posterior staminode, epipetalous, didynamous with generally the anterior pair longer, anthers 2-celled, longitudinally dehiscing, connective often well developed, necter-bearing discs often present between the stamens and the ovary.


Carpels 2, medianly placed, united, ovary usually 2 locular as apparently 4-locular by an inward projection of the ovarian wall, with one ovule in each chamber on axile placentae, style single gynobasic stigma 2 lobed.


Typically of 4 nutlets(carcerule).




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Identifying character

  • Plants herbs, square stem.
  • Inflorescence verticillaster.
  • Petals bilabiate.
  • Stamens 4, didynamous.
  • Carpels 2, 4-celled, style gynobasic.

Important Plants of Lamiaceae Family

Economically it is a very important family. Plants described here in different banners are:

Purpose Plant name and comments Image
Medicinal Ocimum americanum L.

essential oils used in medicine.

Image source: Here

Ocimum sanctum L.

leaf  juice used for cough, cold and fever.

Image source: Here

Mentha arvensis L.

stimulant and carminative.

Image source: Here

Mentha piperita L.

source of pepermint oil.

Peppermint Seeds (Mentha piperita)
Image source: Here

Thymus vulgaris L.

source of thymol also used in medicine.

Image source: Here
Ornamental Salvia splendens
Sellow ex. J.A. Schultes
Salvia splendens (357118788).jpg
Image source: Here
Coleus blumei Benth.
Image source: Here
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About Nusrat Jahan

A student of Department of Botany at the University of Dhaka. Opportunity seeker. Hope to do something remarkable. Email: nusratjahannitu81@gmail.com. Minimum monthly resolution- Publish(1), Revise(5), Share(1)

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