Carum, Ajowan

Names and Synonyms

Common Names

• Ajowan
• Ethiopian-caraway
• bishop's-weed
• kummel

Scientific Names

Accepted name

Synonyms

• Ptychotis ajawain
• Carum ajowan
• Carum ammi
• Selinum copticum
• Bunium copticum
• Trachyspermum copticum
• Carum copticum
• Daucus copticus
• Pituranthos korolkowii
• Ammi cicutarium
• Athamanta ajowan
• Ligusticum ajowan
• Ligusticum ajawain
• Deverra korolkowii
• Carum korolkowii
• Helosciadium ammi
• Ammi copticum
• Ammios muricata
• Bunium aromaticum
• Daucus anisodorus
• Seseli gilliesii
• Seseli foeniculifolium
• Ptychotis coptica
• Carum ajawain

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and the phylum Streptophyta, specifically falling under the class Equisetopsida and subclass Magnoliidae. Within the order Apiales, it is a member of the Apiaceae family. It is scientifically classified under the genus Trachyspermum, with its specific species designation being ammum.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a specific distribution pattern across various regions of the European continent. In Northern Europe, its presence can be documented in both Great Britain and Sweden. Moving toward the center of the continent, it is also found within Middle Europe. Specifically, the species inhabits parts of Austria as well as the Czechia-Slovakia region. Finally, its geographical range extends into Germany, completing its documented spread through these territories.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Trachyspermum ammī is characterized by its ability to thrive across a diverse altitudinal gradient, ranging from elevations as low as 500 m AMSL to a maximum of 2200 m AMSL. This plant is frequently found in disturbed or semi-aquatic environments, specifically colonizing habitats such as rivers and roadsides. These specific niches suggest an adaptability to varying moisture levels and soil stability, often occupying transitional zones where water availability is consistent or where human-altered landscapes provide open growing spaces.

Elevational range max:

2200 m AMSL

Elevational range min:

500 m AMSL

Habitat :

rivers, roadsides

Life history

The life history of Trachyspermum ammi is characterized by an annual lifecycle, completing its entire developmental process from germination to seed production within a single growing season. As an annual herb, the plant begins its life cycle when seeds germinate in favorable soil conditions, typically following seasonal rains. It undergoes a rapid vegetative growth phase, establishing a branched stem and characteristic pinnate leaves. This is followed by a reproductive stage where the plant produces small, white, umbellate inflorescences. Once flowering is complete, the plant focuses its energy on the maturation of its schizocarps, which contain the essential oils valued in medicinal applications. After the dispersal of these seeds, the individual plant completes its biological mission and dies, leaving the seeds to remain dormant in the soil to await the next cycle of favorable environmental conditions.

Lifecycle :

annual

Morphology

The morphology of Trachyspermum ammì is characterized by its growth form as a non-woody herb and forb. This self-supporting plant is terrestrial in nature, neither aquatic nor an epiphyte, and functions as an independent organism rather than a parasite. In terms of stature, it is a relatively low-growing species with a plant height that ranges from a minimum of 0.2 m to a maximum of 0.5 m, maintaining an average height of approximately 0.6 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

forb

Parasite :

independent

Plant height max:

0.5 m

Plant height mean:

0.6 m

Plant height min:

0.2 m

Woodiness :

non-woody

Physiology

The physiology of Trachyspermum ammi is characterized by complex metabolic processes primarily focused on the biosynthesis of volatile essential oils, such as thymol and p-cymene, within specialized secretory structures. These secondary metabolites are synthesized via the shikimate and mevalonate pathways, playing a crucial role in the plant's chemical defense mechanisms against herbivory and microbial pathogens. The plant exhibits typical C3 photosynthetic pathways, utilizing atmospheric carbon dioxide to drive biomass production through enzymatic processes in the chloroplasts. In terms of nutrient acquisition and symbiotic relationships, Trachyspermum ammi does not function as a nitrogen fixer; it lacks the specialized root nodules or symbiotic associations with diazotrophic bacteria (such as Rhizobium) required to convert atmospheric nitrogen into bioavailable forms, meaning it relies entirely on the uptake of nitrates and ammonium from the soil. Its physiological resilience is further supported by an efficient transpiration mechanism and osmotic regulation that allows it to maintain turgor pressure and metabolic activity in semi-arid environments.

Nitrogen fixer :

no

Reproduction

The reproduction of Trachyspermum ammmi is characterized by a specific flowering phenology and specialized pollination mechanisms. The flowering period typically commences in July and concludes in August. The plant utilizes biotic pollination syndromes, specifically relying on insects for the transfer of pollen. Within this insect-mediated process, bees play a significant role as primary pollinators. Furthermore, the species is capable of self-fertilization, ensuring reproductive success through the presence of self-pollination mechanisms.

Flowering time :

Jul

Flowering time :

Aug

Pollination syndrome :

insect

Pollination syndrome :

bee

Pollination syndrome :

biotic

Self fertilization :

present

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Trachyspermum ammi has 2 reported plant parts identified across 4 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include fruit, seed.

Fruit

1. Journal of separation science
2. Chemical & pharmaceutical bulletin
3. Plants (Basel, Switzerland)

Seed

1. Parasitology

Chemicals

Trachyspermum ammi has 62 reported phytochemicals identified across 4 scientific publications and several other databases. The most consistently reported chemicals include THYMOL, CARVACROL, GAMMA-TERPINENE, Flavonoids, P-CYMENE.

THYMOL

1. Dr. Duke
2. Daru : journal of Faculty of Pharmacy, Tehran University of Medical Sciences
3. Environmental science and pollution research international
4. Avicenna journal of phytomedicine
5. Journal of infection and public health

CARVACROL

1. Dr. Duke
2. Current molecular pharmacology
3. Current medical mycology
4. Journal de mycologie medicale
5. Foods (Basel, Switzerland)

GAMMA-TERPINENE

1. Dr. Duke
2. Daru : journal of Faculty of Pharmacy, Tehran University of Medical Sciences
3. Pharmacognosy research

Flavonoids

1. BMC complementary and alternative medicine
2. Journal of infection and public health

P-CYMENE

1. Dr. Duke
2. Foods (Basel, Switzerland)

Para-cymene

1. Daru : journal of Faculty of Pharmacy, Tehran University of Medical Sciences
2. Pharmacognosy research

Tannins

1. BMC complementary and alternative medicine
2. Journal of infection and public health

-carotene

1. Dr. Duke

6-Benzyladenine

1. Asian Pacific journal of tropical biomedicine

AFB 1

1. Environmental geochemistry and health

Activities

Trachyspermum ammi has 295 reported activities identified across 4 scientific publications and several other databases. The most consistently reported activities include Antioxidant, Antimicrobial, Antispasmodic, Analgesic, Antibacterial.

Antioxidant

1. Dr. Duke
2. Frontiers in bioscience (Landmark edition)
3. Scientific reports
4. Journal of food science
5. Frontiers in nutrition

Antimicrobial

1. Journal of food science
2. Folia microbiologica
3. BMC plant biology

Antispasmodic

1. Dr. Duke
2. Journal of food science
3. BMC plant biology

Analgesic

1. Dr. Duke
2. Journal of food science

Antibacterial

1. Dr. Duke
2. Frontiers in bioscience (Landmark edition)

Antidiabetic

1. Dr. Duke
2. Frontiers in bioscience (Landmark edition)

Antiinfective

1. Dr. Duke
2. Phytotherapy research : PTR

Antiinflammatory

1. Dr. Duke
2. Phytotherapy research : PTR

Antiseptic

1. Dr. Duke
2. Journal of food science

Antitumor

1. Dr. Duke
2. Frontiers in nutrition

Medicinal Uses

Trachyspermum ammi has 28 reported medicinal uses identified across 4 scientific publications and several other databases. The most consistently reported uses include antidiabetic, antioxidant, filariasis, malaria, Breast cancer.

Most Reported Uses

Preparations