Primrose

Names and Synonyms

Common Names

• Primrose
• Asian Coromandel
• Asystasia
• Creeping Foxglove
• Ganges primrose

Scientific Names

Accepted name

Synonyms

• Ruellia gangetica
• Justicia gangetica

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and is classified under the phylum Streptophyta and class Equisetopsida. Within the subclass Magnoliidae, it is organized under the order Lamiales and the family Acanthaceae. Its specific taxonomic placement is within the genus Asystasia, specifically identified as Asystasia gangeetica.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a widespread geographical distribution spanning several distinct regions across the globe. In the Macaronesian islands, it can be found specifically on the island of Madeira. Its presence extends to South Tropical Africa, where it is documented in Angola. Furthermore, the species inhabits the Western Indian Ocean, occurring on both Mauritius and Réunion. Finally, its range reaches East Asia, specifically within South-Central China.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Asystasia gangetica is characterized by its ability to thrive across a wide altitudinal gradient, occupying an elevational range that extends from 0 m AMSL up to a maximum of 1500 m AMSL. This broad vertical distribution allows the species to adapt to diverse environmental conditions found from lowland plains to mid-elevation montane regions. While specific primary habitat classifications are often categorized generally, the plant typically populates various niches within this elevational span, demonstrating significant ecological plasticity in its ability to colonize different landscapes.

Elevational range max:

1500 m AMSL

Elevational range min:

0 m AMSL

Habitat :

-

Genetics

The genetics of Asystasia gangetica are characterized by a notable degree of chromosomal variability and complex karyotypic diversity. Research into its cytogenetic profile reveals a wide range of chromosome numbers, with documented values including 26, 28, 44, 48, 50, and 52. Despite this extensive variation in chromosome count across different populations or accessions, the plant is typically identified with a ploidy level of 2, indicating a diploid state. This combination of varying chromosome numbers within a diploid framework suggests a highly dynamic genomic structure that may contribute to the species' adaptability and widespread distribution.

Chromosome number :

26, 28, 44, 48, 50, 52

Ploidy :

2

Life history

The life history of Asystasia gangetica is characterized by its classification as a perennial plant, allowing it to persist through multiple growing seasons. In terms of its biological structure and survival strategy, the species functions as a therophyte, completing its life cycle through a specific developmental pattern that enables it to endure varying environmental conditions. This life form indicates that the plant typically survives unfavorable periods in the form of seeds, which then germinate to produce the seasonal growth required for its reproductive cycle.

Life form :

therophyte

Lifecycle :

perennial

Morphology

The morphology of Asystasia gangetica is characterized by its growth form as a non-woody herb and forb, functioning as a self-supporting plant rather than a liana or vine. It typically exhibits a prostrate shoot orientation and is classified as an independent organism, lacking parasitic behavior. The plant is strictly terrestrial in its habitat, functioning neither as an aquatic nor an epiphyte. In terms of stature, it displays significant variability in height, with individual specimens ranging from a minimum of approximately 0.30 meters to a maximum of 2 meters, maintaining an average plant height of about 1.1 meters.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

forb

Parasite :

independent

Plant height max:

2 m

Plant height mean:

1.1 m

Plant height min:

0.304803706 m

Shoot orientation :

prostrate

Woodiness :

non-woody

Physiology

The physiology of Asystasia gangetica is characterized by a C3 photosynthetic pathway, which dictates its metabolic processes and carbon fixation efficiency. The plant exhibits non-succulent foliage, indicating a standard water management strategy rather than specialized water storage tissues. Its leaf morphology displays significant variability in dimensions, with leaf lengths ranging from a minimum of 2.5 cm to a maximum of 13 cm, maintaining a mean leaf length of approximately 7.5 cm. Furthermore, the leaf width fluctuates between a minimum of 1 cm and a maximum of 4 cm. From a nutrient acquisition standpoint, the plant does not function as a nitrogen fixer, relying instead on the uptake of available nitrogen from the soil through its root system.

Leaf length max:

13 cm

Leaf length mean:

7.5 cm

Leaf length min:

2.5 cm

Leaf width max:

4 cm

Leaf width min:

1 cm

Nitrogen fixer :

no

Photosynthetic pathway :

C3

Succulence :

no

Reproduction

The reproduction of Asystasia gangetica is driven by biotic pollination processes, specifically utilizing an insect pollination syndrome where bees play a significant role in the transfer of pollen. The plant produces distinct blue flowers to attract these pollinators. Following successful fertilization, the plant develops a capsule-type fruit. These capsules are dehiscent in nature, meaning they split open at maturity to release the seeds. The fruits typically measure between 2 cm and 3 cm in length, with an average fruit length of approximately 3 cm. Each fruit contains a seed count ranging from 1 to 10 seeds. For the dissemination of its progeny, the plant employs an autochorous dispersal syndrome, utilizing autochorous mechanisms to spread seeds away from the parent plant.

Dehiscence :

dehiscent

Dispersal syndrome :

autochorous

Flower colour :

blue

Fruit length max:

3 cm

Fruit length min:

2 cm

Fruit type :

capsule

Pollination syndrome :

insect

Pollination syndrome :

bee

Pollination syndrome :

biotic

Seeds_per_fruit :

1-10

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Asystasia gangetica has 1 reported plant parts identified across 2 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include leaf.

Leaf

1. Journal of intercultural ethnopharmacology
2. Natural product research

Chemicals

Asystasia gangetica has 1 reported phytochemicals identified across 2 scientific publications and several other databases. The most consistently reported chemicals include Flavonoid.

Flavonoid

1. Data in brief

Activities

Asystasia gangetica has 4 reported activities identified across 2 scientific publications and several other databases. The most consistently reported activities include Antibacterial, Antidiabetic, Antioxidant, Hepatoprotective.

Antibacterial

1. Chemistry & biodiversity

Antidiabetic

1. Chemistry & biodiversity

Antioxidant

1. Chemistry & biodiversity

Hepatoprotective

1. Chemistry & biodiversity

Conditions

Asystasia gangetica has 4 reported investigations on conditions identified across 2 scientific publications and several other databases. The most consistently reported conditions include antidiabetic, antioxidant, bone diseases, cancer.

Antidiabetic

1. Chemistry & biodiversity

Antioxidant

1. Chemistry & biodiversity

Bone diseases

1. Journal of ethnopharmacology

Cancer

1. Natural product research

Preparations

Asystasia gangetica has 3 reported preparations identified across 2 scientific publications and several other databases. The most consistently reported preparations include aqueous leaf extracts, ethanolic leaf extracts, methanolic extract.

Aqueous leaf extracts

1. Journal of intercultural ethnopharmacology

Ethanolic leaf extracts

1. Journal of intercultural ethnopharmacology

Methanolic extract

1. Data in brief