Mermaid weed

Photo: Rudi77, CC BY-SA 3.0, via Wikimedia Commons

Stem plant · Haloragaceae

Mermaid weed

Proserpinaca palustris L.

mediumGrowth: medium

—

Height in the aquarium

medium to high

Light

low

CO₂ needs

20–25 °C

Ideal temperature

Water parameters

Understand these values
pH5 – 7.5
49
Carbonate hardness (KH)0 – 18°
0°25°
Temperature10 – 28°Cideal 20–25°C
0°C35°C
Position
background, midground
Propagation
cuttings
Uses
colour accent
Grows emersed
yes

In the wild

Overview

Its foliage changes clearly when it moves to life underwater: the green emersed form gives way to more finely cut leaves, often orange-red. Several American forms exist, including a Cuban strain circulated in the hobby. It makes a colour accent without the speed of some red stem plants.

Scientific name
Proserpinaca palustris L.
Classification
Saxifragales › Haloragaceae
IUCN Red List
Least concern (LC)

Natural habitat

North America, Central America, Caribbean, southern South America

Observations (GBIF) and localities Native countries Rivers and lakes

Native countries
Introduced by people

No introduction reported outside its native range.

Countries: Kew World Checklist of Vascular Plants (WCVP). Dots: GBIF observations in the native countries.

In the aquarium

Growing in the aquarium

It takes time to acclimatise. Medium to strong light, CO₂ and balanced feeding bring out the colours; in particular keep up the iron supply. It forms few side shoots. After trimming, replant the top part to keep a presentable plant, possibly keeping the base to get new cuttings.

Sources:Flowgrow GBIF POWO (Kew) · Base map: Natural Earth

Mermaid weed · Aquarius