Persicaria hydropiperoides

false waterpepper, water-pepper

Family:Polygonaceae

Rarity

CNPS-EB: B

10 current natural populations

Criteria:

Limited/Threatened Habitat

Observations

CNPS-EB Database ⓘ
Calflora (group) ⓘ
Calflora (public)
iNaturalist
- Genus Persicaria
- Persicaria hydropiperoides
CCH2

Key

Ecology

Flowers June - October

Habitats:

Freshwater Marsh
Riparian

All Persicaria

P. hydropiperoides
P. lapathifolia (B)
P. punctata (C)

References

Synonyms

Persicaria opelousana
Persicaria paludicola
Polygonum hydropiperoides
Polygonum hydropiperoides var. asperifolia

Populations

Key

Location	Pop ID	Last Recorded	Notes
Briones Rgnl Park	7	2017-10-22
Browns Island	5	2015-09-12
Corteva Wetlands	2	2023-09-02
Corteva Wetlands	6	2024-08-22
Dimond Park/District, Oakland	12	2021-03-31
Martinez shoreline - out of park or specific site unknown	11	2004-06-06
Niles Canyon area	3	2004-07-24
Pt. Pinole Rgnl Park	9	2023-09-06
Sycamore Grove Rgnl Park - LAPRD	10	2024-09-30
Vargas Plateau	4	2007-12-31
Sand Mound Slough	1	1978-10-24	Historic
Warm Springs, Fremont	8	2022-10-10	ID Uncertain

The list of populations shows the distinct populations identified by the CNPS-EB Rare and Unusual Plants Committee. The locations in this list are very general. More specific location details can be obtained from the links in the Observations section (for some of these links, a login is required).

Font

Populations in bold type have precise coordinates available for field volunteers and researchers.

Populations in normal type are only known from a description of the location; no precise coordinates are available.

Background

Populations with a white background have been observed in the last 25 years.

Populations with a blue background have not been observed for at least 25 years.

Populations with an orange background have an uncertain location or identification, or are planted.

Columns

Pop ID is a label that identifies the population. Many locations have more than one population of a species, and the population ID is used to distinguish them.