false water-pepper

Names and Synonyms

Common Names

• false water-pepper
• mild smartweed
• mild water-pepper
• Mild Waterpepper
• false waterpepper
• northeastern smartweed

Scientific Names

Accepted name

Synonyms

• Persicaria hydropiperoides var. strigosa
• Persicaria hydropiperoides var. bushiana
• Persicaria persicarioides
• Persicaria hydropiperoides var. persicarioides
• Polygonum hydropiperoides var. persicarioides
• Polygonum hydropiperoides var. strigosum
• Polygonum tarmense
• Polygonum hydropiperoides var. macounii
• Polygonum persoonii
• Polygonum hydropiperoides var. psilostachyum
• Polygonum persicarioides
• Polygonum opelousanum
• Polygonum hydropiperoides
• Persicaria hydropiperoides var. euronotorum
• Persicaria hydropiperoides var. breviciliata
• Persicaria opelousana
• Polygonum hydropiperoides var. macerum
• Polygonum hydropiperoides var. euronotorum
• Polygonum hydropiperoides var. digitatum
• Polygonum hydropiperoides var. bushianum
• Polygonum hydropiperoides var. breviciliatum
• Polygonum hydropiperoides var. asperifolium
• Polygonum hydropiperoides var. adenocalyx
• Polygonum hydropiperoides subsp. opelousanum
• Polygonum hydropiperoides f. strigosum
• Polygonum hydropiperoides f. rubrum
• Polygonum hydropiperoides f. leucochranthum
• Polygonum virgatum var. latifolium
• Polygonum opelousanum var. adenocalyx
• Polygonum hydropiperoides var. sanibelense

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae within the phylum Streptophyta and is classified under the class Equisetopsida. As a member of the subclass Magnoliidae and the order Caryophyllales, it is situated in the family Polygonaceae. Ultimately, it is identified by the genus Persicaria.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a remarkably wide and fragmented geographical distribution across several distinct global regions. In the Atlantic, it can be found inhabiting the Macaronesian islands, specifically within the Azores and the Canary Islands. Its range extends to the northern reaches of the Americas, where it is located in subarctic Alaska. Moving toward the eastern hemisphere, the species is documented in the Russian Far East, particularly in the Primorye region. Finally, the plant is also known to grow within the Caucasus, specifically throughout the Transcaucasus area.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Persicaria hydropiperoides is characterized by its remarkable adaptability to diverse environmental conditions and a broad altitudinal distribution. This species thrives across a wide variety of habitats, including anthropic areas, Caatinga (strictu sensu), Cerrado (lato sensu), Ombrophilous Forest (rainforest), Ombrophilous Mixed Forest, and aquatic vegetation. Its vertical distribution is extensive, ranging from sea level (0 m AMSL) up to a maximum elevation of 3200 m AMSL, with a mean elevational range centered around 865 m AMSL. This ability to occupy both terrestrial ecosystems—from semi-arid scrublands to lush rainforests—and aquatic environments underscores its high ecological plasticity.

Elevational range max:

3200 m AMSL

Elevational range mean:

865 m AMSL

Elevational range min:

0 m AMSL

Habitat :

Área Antrópica, Caatinga (stricto sensu), Cerrado (lato sensu), Floresta Ombrófila (= Floresta Pluvial), Floresta Ombrófila Mista, Vegetação Aquática

Life history

The life history of Persicaria hydropiperoides is characterized by a perennial lifecycle, allowing the plant to persist through multiple growing seasons. Structurally, it is classified as a hemicryptophyte, a growth form in which the perennating buds are located at or just below the soil surface, protected by leaf litter or organic matter during unfavorable periods. This life form, consistent with its hemicryptophyte designation, enables the plant to survive seasonal environmental shifts and re-emerge to continue its developmental stages over several years.

Life form :

hemicryptophyte

Lifecycle :

perennial

Morphology

The morphology of Persicaria hydropiperoides is characterized by its growth as a non-woody herb, specifically categorized as a forb. The plant is self-supporting rather than acting as a climber or liana, and it functions as an independent organism without parasitic tendencies. It is a terrestrial species, meaning it does not exhibit epiphytic or aquatic habits. In terms of stature, the plant reaches a maximum height of 0.6 m, with an average plant height of approximately 0.325 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Growth form :

forb

Parasite :

independent

Plant height max:

0.6 m

Plant height mean:

0.325 m

Woodiness :

non-woody

Physiology

The physiology of Persicaria hydropiperoides is characterized by a C3 photosynthetic pathway, a common metabolic strategy that facilitates carbon fixation under temperate to sub-tropical conditions. The plant exhibits specific morphological adaptations reflected in its foliage, maintaining an average leaf size of approximately 16.09849 cm². Furthermore, its leaf architecture is defined by a mean Specific Leaf Area (SLA) of 330 cm²/g, indicating a relatively high degree of leaf expansion per unit of dry mass, which suggests a physiological emphasis on maximizing light interception and gas exchange efficiency.

Leaf size mean:

16.09849 cm²

Photosynthetic pathway :

C3

Specific Leaf Area (SLA) mean:

330 cm²/g

Reproduction

The reproduction of Persicaria hydropiperoides is characterized by a sexual process through bisexual flowers, which facilitates genetic diversity. The pollination mechanism is primarily biotic, specifically involving an insect pollination syndrome. Notably, self-fertilization is absent in this species, necessitating the involvement of external agents for successful fertilization. The plant produces a significant quantity of seeds, with each fruit typically containing between 101 and 1000 seeds. These seeds are relatively lightweight, exhibiting a mean mass of 0.001381 g, with a minimum mass of 0.00074 g and a maximum mass of 0.00445 g. For the distribution of its progeny, the species utilizes a hydrochorous dispersal syndrome, relying on water as the primary medium to transport its seeds to new habitats.

Dispersal syndrome :

hydrochorous

Pollination syndrome :

insect

Pollination syndrome :

biotic

Reproduction sexual :

bisexual

Seed mass max:

0.00445 g

Seed mass mean:

0.001381 g

Seed mass min:

0.00074 g

Seeds_per_fruit :

101-1000

Self fertilization :

absent

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Persicaria hydropiperoides has 13 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include quercetin, ETHYL GALLATE, Gallic acid, Isorhamnetin, Vanillic acid.

quercetin

1. Dr. Duke
2. Natural product research

ETHYL GALLATE

1. Natural product research

Gallic acid

1. Dr. Duke

Isorhamnetin

1. Dr. Duke

Vanillic acid

1. Dr. Duke

kaempferol

1. Dr. Duke

malic acid

1. Dr. Duke

oxalic acid

1. Dr. Duke

p-Hydroxycinnamic acid

1. Dr. Duke

p-hydroxy benzoic acid

1. Dr. Duke

Activities

Persicaria hydropiperoides has 243 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Antibacterial, 11B-HSD-Inhibitor, 5-Lipoxygenase-Inhibitor, ACE-Inhibitor, ATPase-Inhibitor.

Antibacterial

1. Dr. Duke
2. Natural product research

11B-HSD-Inhibitor

1. Dr. Duke

5-Lipoxygenase-Inhibitor

1. Dr. Duke

ACE-Inhibitor

1. Dr. Duke

ATPase-Inhibitor

1. Dr. Duke

Acaricide

1. Dr. Duke

Acidifier

1. Dr. Duke

Additive

1. Dr. Duke

Aldehyde-Oxidase-Inhibitor

1. Dr. Duke

Aldose-Reductase-Inhibitor

1. Dr. Duke