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Limnocharitaceae family

Waterpoppy Hydrocleys nymphoides

Waterpoppy is an introduced plant, found in the lower 48 states and Puerto Rico.

More about this plant

Hydrocleys nymphoides, the waterpoppy or water-poppy, is an aquatic plant species in the Alismataceae. It is widespread across South America, Central America, Puerto Rico, Trinidad and the Netherlands Antilles. It is cultivated in many places for used in decorative ponds and artificial aquatic habitats, and naturalized in Australia, New Zealand, South Africa, Fiji, New Caledonia, French Polynesia, Florida, Louisiana and Texas. Wikipedia →

⚠ Invasive here — plant a native instead USDA + GBIF

Waterpoppy is flagged invasive in the U.S. These natives fill a similar niche — same growth habit, bloom season, height, and region — so you keep the look and feed local wildlife instead of spreading a problem.

Black-eyed Susan
Native
Black-eyed Susan
Rudbeckia hirta
●●●●●
Common Sunflower
Native
Common Sunflower
Helianthus annuus
●●●●●
Seaside Goldenrod
Native
Seaside Goldenrod
Solidago sempervirens
●●●●●
Seaside Goldenrod (var. mexicana)
Native
Seaside Goldenrod (var. mexicana)
Solidago sempervirens var. mexicana
●●●●●
Matched on growth habit · bloom months · mature height · shared U.S. range (USDA + GBIF) — a starting point, not a prescription.

Growing & care

USDA PLANTS · TRY
Conditions
Sources · Conditions
Cold hardiness (derived) — Hardiness
Hardiness
≥ zone 10 derived from its U.S. range
In the garden
Rain garden / bioswale — Rated OBL on the wetland list — tolerates wet feet, so it suits the soggy zone of a rain garden or bioswale that catches and filters runoff.Open guide →
derived roles
Species characteristics from USDA PLANTS (public domain) + TRY (CC BY) — general guidance, not a guarantee for your exact site. Deer "browsing" is documented palatability, not a deer-proof claim.
Sources for this entry (12) Open & cited
[01] Scientific name & family — USDA PLANTS (DwCA, Zenodo 17903503)
[02] Growth habit & duration — USDA PLANTS (DwCA, Zenodo 17903503)
[03] Native status & distribution — USDA PLANTS (DwCA, Zenodo 17903503)
[04] Common name — USDA PLANTS (via GBIF)
[05] Invasive / introduced status — US-RIIS v2.0 (USGS)
[06] Wetland indicator — USACE National Wetland Plant List (2022)
[08] Description — Wikipedia (CC BY-SA)
[09] Conservation rank — NatureServe Explorer (CC BY)
[10] Cold hardiness (derived) — Derived from U.S. range × USDA PHZM zones
[12] County range — GBIF Open Data — open-licensed occurrences (CC0/CC-BY) → county
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