Eriocaulon quinquangulare

Also known as Five-angled pipewort, Erio quinquangulare

FreshwaterRosetteSide shootsPlantlets

Eriocaulon quinquangulare (Eriocaulon quinquangulare) — Yercaud-elango · CC BY-SA 4.0

Care at a glance

Light: High light
CO2: CO₂ required
Temperature: 72–82°F; 22–28°C
Max height: 3.1 in; 8 cm

Growth rate: Slow
Placement: Midground
Type: Rosette
pH: 5.0–6.8
Hardness: 0–4 dGH
Spread: 3.1 in (8 cm)
Nutrient uptake: Root + water column
Growth region: Submersed
Difficulty: Difficult
Family: Eriocaulaceae
Origin: Tropical Asia, from the Indian subcontinent through Indo-China (India, Sri Lanka, Bangladesh, Myanmar, Vietnam)

Overview

A collector rosette that needs high light, heavy CO2 (it often wants more than the usual 30ppm), and very soft water with KH under about 3, plus a rich, ammonia-loaded aquasoil. Fraying, pale or melting outer leaves are the classic sign that CO2 or GH/KH is off. It is delicate and squashes easily, so handle by the base and plant carefully. Growth is slow, and it multiplies by throwing side rosettes rather than seeding readily in the tank.

In the wild

A pipewort native across tropical Asia, from the Indian subcontinent through Indo-China, where it grows in marshy ground, rice paddies and seasonally flooded pools with soft, mineral-poor water. It forms a low rosette of fine, grass-like leaves that radiate from a central point.

Good to know

The species name quinquangulare means five-angled, a reference to the five-ribbed flower stalks the plant throws up. It belongs to Eriocaulaceae, a family of monocots whose members are grown in the hobby as demanding rosette plants. Like other Eriocaulon it forms a symbiotic relationship with root bacteria and is very sensitive to carbonate hardness.

Did you know

Did you know Eriocaulon roots host nitrogen-related bacteria, which is one reason hobbyists find these plants do best in fresh, ammonia-rich aquasoil rather than an old, mineralised substrate.