Small Knotweed

Names and Synonyms

Common Names

• Small Knotweed

Scientific Names

Accepted name

Synonyms

• Polygonum plebeium var. elegans
• Polygonum plebeium var. indicum
• Polygonum plebeium var. scindicum
• Polygonum herniarioides var. prostratum
• Polygonum anomalum
• Avicularia indica
• Polygonum pteranthum
• Polygonum styligerum
• Polygonum tropicum
• Polygonum roxburghii var. longifolium
• Polygonum plebeium var. griffithii
• Polygonum plebeium var. longifolium
• Polygonum herniarioides var. illecebroides
• Polygonum plebeium var. micranthemum
• Polygonum minutiflorum
• Polygonum humifusum var. mandshuricum
• Polygonum miquelianum
• Polygonum aviculare var. minutiflorum
• Polygonum herniarioides
• Polygonum dryandri
• Polygonum exiguum
• Polygonum plebeium var. miquelianum
• Polygonum ciliosum
• Polygonum cliffortioides
• Polygonum plebeium var. brevifolium
• Polygonum changii
• Polygonum franchetii
• Polygonum plebeium subsp. changii
• Polygonum perrottetii
• Polygonum roxburghii
• Persicaria minutiflora
• Pleuropteropyrum minutiflorum
• Polygonum illecebroides
• Polygonum indicum

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and the phylum Streptophyta, falling under the class Equisetopsida and subclass Magnoliidae. Within the order Caryophyllales, it is classified under the family Polygonaceae. Finally, it is identified by the genus Polygonum.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a diverse geographical distribution spanning several different continents. In Middle Europe, it can be found growing within the borders of Germany. Its range extends southward into Northern Africa, specifically within the country of Egypt. Moving toward the western regions, the species is established in West Tropical Africa. Specifically, it inhabits the nations of Benin, Burkina, and Mali.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Polygonum plebeium is defined by a remarkably broad altitudinal distribution, allowing it to inhabit a diverse array of mountain and lowland environments. This species demonstrates significant ecological plasticity, occupying habitats ranging from sea level to high-altitude zones, with a minimum elevation of 20 m AMSL and a maximum elevation reaching up to 3000 m AMSL. Across its various ecological niches, the plant maintains an average elevation of approximately 1115 m AMSL, suggesting a preference for mid-altitude terrains while remaining capable of colonizing both lowland coastal areas and subalpine regions.

Elevational range max:

3000 m AMSL

Elevational range mean:

1115 m AMSL

Elevational range min:

20 m AMSL

Life history

The life history of Polygonum plebeium is characterized by an annual lifecycle, meaning the plant completes its entire developmental sequence from germination to seed production within a single growing season. In terms of its structural biological classification, it is categorized as a therophyte, a life form defined by plants that survive the unfavorable seasons as ephemeral seeds rather than through persistent vegetative structures. This strategy allows the species to rapidly colonize disturbed or seasonal habitats, relying on the seasonal availability of moisture and warmth to fuel its quick progression from seedling to reproductive maturity.

Life form :

therophyte

Lifecycle :

annual

Morphology

The morphology of Polygonum plebeium is characterized by its growth form as a non-woody herb, specifically classified as a forb. It is a self-supporting plant that does not function as a climber or a liana, nor does it exhibit parasitic or epiphytic behavior, as it grows in a terrestrial habitat. The plant maintains an independent life cycle and lacks woodiness throughout its structure. In terms of stature, it is a relatively low-growing species with a plant height that typically averages around 0.2 m, though individual specimens can range from a minimum of 0.05 m to a maximum height of 0.44 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

forb

Parasite :

independent

Plant height max:

0.44 m

Plant height mean:

0.2 m

Plant height min:

0.05 m

Woodiness :

non-woody

Physiology

The physiology of Polygonum plebeium is characterized by its specific metabolic and morphological adaptations, primarily utilizing the C3 photosynthetic pathway to facilitate carbon fixation. Morphologically, the plant exhibits a distinct leaf structure with significant variability in dimensions; the leaves typically maintain a mean length of 1 cm, ranging from a minimum of 0.3 cm to a maximum of 2 cm. The width of the foliage is notably narrow, maintaining a consistent mean and minimum value of 0.1 cm, while reaching a maximum width of 0.4 cm. Furthermore, the plant does not function as a nitrogen fixer, meaning it relies on external soil nitrogen sources rather than symbiotic diazotrophic processes to support its physiological development.

Leaf length max:

2 cm

Leaf length mean:

1 cm

Leaf length min:

0.3 cm

Leaf width max:

0.4 cm

Leaf width mean:

0.1 cm

Nitrogen fixer :

no

Photosynthetic pathway :

C3

Reproduction

The reproduction of Polygonum plebeium is characterized by the production of small, indehiscent fruits classified as achenes. These fruits exhibit a compact size, with a mean fruit length of 0.1875 cm, ranging from a minimum of 0.15 cm to a maximum of 0.2 cm. Within these achenes, the seeds are notably lightweight, possessing a mean seed mass of approximately 0.000413333 g. The individual seed masses vary significantly, with the smallest recorded weight being 0.00016 g and the largest reaching up to 0.00064 g, ensuring a high potential for dispersal through their minute and lightweight structure.

Dehiscence :

indehiscent

Fruit length max:

0.2 cm

Fruit length mean:

0.1875 cm

Fruit length min:

0.15 cm

Fruit type :

achene

Seed mass max:

0.00064 g

Seed mass mean:

0.000413333 g

Seed mass min:

0.00016 g

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Polygonum plebeium has 6 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include CO, CU, FE, MN, ZN.

CO

1. Asian Pacific journal of tropical medicine

CU

1. Asian Pacific journal of tropical medicine

FE

1. Asian Pacific journal of tropical medicine

MN

1. Asian Pacific journal of tropical medicine

ZN

1. Asian Pacific journal of tropical medicine

betulinic acid

1. Dr. Duke

Activities

Polygonum plebeium has 18 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Anthelmintic, AntiHIV, Antibacterial, Anticancer, Anticarcinomic.

Anthelmintic

1. Dr. Duke

AntiHIV

1. Dr. Duke

Antibacterial

1. Dr. Duke

Anticancer

1. Dr. Duke

Anticarcinomic

1. Dr. Duke

Antiedemic

1. Dr. Duke

Antiinflammatory

1. Dr. Duke

Antileukemic

1. Dr. Duke

Antimalarial

1. Dr. Duke

Antimelanomic

1. Dr. Duke

Medicinal Uses

Polygonum plebeium has 3 reported medicinal uses identified across 0 scientific publications and several other databases. The most consistently reported uses include eczema, skin diseases, wound.

Most Reported Uses