Dwarf Renga

Botanical name: Arthropodium candidum
Common name(s): Dwarf Renga, Small Rock Lily, Dwarf Rengarenga
Synonyms: Arthropodium reflexum, Arthropodium ramulosum, Arthropodium bulbosum

Plant facts:
A delicate small native lily endemic to New Zealand, valued for its fine grass-like foliage and airy white star-shaped flowers. Dwarf renga forms small colonies through slender rhizomes and underground tubers, making it an excellent woodland and rock garden groundcover.

Natural habitat:
Occurs naturally in lowland to montane forest margins, rocky outcrops, shaded cliff faces, damp banks, open scrub, and coastal herbfields.

Growing environment:
Partial shade to filtered sun, Moist well-drained soils, Coastal tolerant & Frost tolerant.
Thrives in cool shaded environments with consistent moisture and humus-rich soil.

Endemic distribution:
Endemic to New Zealand.

Height:
Approximately 5–10 cm tall in foliage, up to 30 cm tall when flowering

Width:
Forms small spreading colonies approximately 10–30 cm across

Flowering:
Late spring to summer
Produces delicate white star-like flowers held above the foliage.

Fruiting:
Summer to autumn
Small capsules release numerous tiny black seeds dispersed by wind.

Uses:

• Woodland groundcover
• Native rock gardens
• Shaded borders and underplanting
• Coastal and forest restoration
• Container planting
• Traditional Māori food and medicinal plant

Cultural uses:
Known traditionally as rengarenga, the small tuberous roots were eaten by Māori and the plant was also used in rongoā Māori for medicinal purposes.

Appearance:

Growth habit:
A delicate tufted perennial herb forming small colonies through slender rhizomes and underground tubers.

Leaves:
Fine linear soft green leaves with a graceful arching habit. Juvenile foliage may be lightly spotted or flushed.

Flowers:
Small white star-shaped flowers borne on slender wiry stems above the foliage during summer.

Fruit:
Small ribbed capsules containing tiny black seeds with finely textured surfaces.

Ecology:
An important understory species providing ground-level diversity and habitat in native forest and rocky environments. Its flowers support native pollinating insects.

Associated wildlife:
Provides shelter for small native invertebrates and seasonal nectar resources for native pollinators.

How to grow:
Easy to grow in cool shaded conditions with reliable moisture and good drainage. Performs especially well beneath shrubs, ferns, and trees.

Propagation:
Easy from fresh seed, division of rooted clumps, or rhizome sections.

Garden value:
A refined and elegant native lily ideal for shaded gardens, woodland plantings, and rockeries. Its delicate foliage and floating white flowers combine well with ferns, mosses, and other smaller native forest plants.