Knotweed

Names and Synonyms

Common Names

• Knotweed

Scientific Names

Accepted name

Synonyms

• Polygonum limbatum
• Polygonum piliferum
• Persicaria amboana
• Polygonum amboanum

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae within the phylum Streptophyta and the class Equisetopsida. Under the subclass Magnoliidae, it is categorized within the order Caryophyllales and the family Polygonaceae. Finally, it is classified under the genus Persicaria.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a specific geographical distribution spanning across several regions of the African continent. In Northern Africa, its presence is documented within the borders of Egypt. Moving toward the western portion of the continent, it is found throughout various West Tropical African nations. Specifically, the species inhabits the territories of Benin, Burkina, and Guinea. Additionally, its range extends further south to include the Ivory Coast.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Persicaria limbata is characterized by a specific altitudinal distribution within its native habitats, thriving within a defined vertical range. This species is primarily found in montane or hilly environments, occupying an elevational range that begins at a minimum of 896 m AMSL and extends to a maximum of 1465 m AMSL. This specific niche suggests an adaptation to temperate to subtropical highland climates, where the environmental conditions such as temperature, humidity, and soil moisture profiles are consistent with these mid-to-high altitude zones.

Elevational range max:

1465 m AMSL

Elevational range min:

896 m AMSL

Life history

The life history of Persicaria limbata is characterized by its status as a perennial plant, allowing it to persist through multiple growing seasons. In terms of its biological structure and survival strategy, it functions as a helophyte, a life form typically found in wetland environments where it transitions between aquatic and terrestrial states. Furthermore, it is classified as a cryptophyte, meaning its regenerative buds are protected below the soil surface or within organic matter, ensuring its survival during unfavorable environmental conditions.

Life form :

helophyte

Life form :

cryptophyte

Lifecycle :

perennial

Morphology

The morphology of Persicaria limbata is characterized by its growth form as a non-woody herb, manifesting primarily as a forb. It functions as an independent organism, neither acting as a parasite nor an epiphyte, as it maintains a terrestrial existence. The plant exhibits a versatile habitat range, capable of thriving in aquatic, semiaquatic, and terrestrial environments. Structurally, it is a self-supporting plant that does not require climbing mechanisms to maintain its posture. In terms of stature, Persicaria limbata typically reaches a minimum plant height of 0.3 meters, with a maximum growth height extending up to approximately 1.22 meters.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Parasite :

independent

Plant height max:

1.219214826 m

Plant height min:

0.3 m

Woodiness :

non-woody

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

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

Leaf

1. Planta medica

Chemicals

Persicaria limbata has 2 reported phytochemicals identified across 1 scientific publications and several other databases. The most consistently reported chemicals include 2',4'-Dihydroxy-3',6'-dimethoxychalcone, CARDAMOMIN.

2',4'-Dihydroxy-3',6'-dimethoxychalcone

1. Planta medica

CARDAMOMIN

1. Planta medica

Preparations

Persicaria limbata has 1 reported preparations identified across 1 scientific publications and several other databases. The most consistently reported preparations include methanol extract.

Methanol extract

1. Planta medica