Inaka

Botanical name: Dracophyllum longifolium
Synonyms: None
Common name(s): Inaka, Inanga

About:
Inaka is a graceful, long-lived shrub or small tree endemic to New Zealand and one of the country’s most widespread members of the Dracophyllum genus. It is characterised by slender trunks, narrow erect leaves arranged in dense tufts at the ends of branches, and elegant drooping spikes of white flowers. Young plants have much broader juvenile leaves before developing the stiff, needle-like adult foliage. Mature specimens can live for well over two centuries.

Natural habitat:
Occurs from sea level to the alpine zone in forest, woodland, shrubland, bogs, coastal cliffs, bluffs, mountain slopes and subalpine scrub. It is especially common in open forest margins and upland vegetation throughout the South Island and subantarctic islands.

Growing environment:
Prefers cool, moist climates with acidic, humus-rich, free-draining soils. It grows well in full sun to light shade and tolerates frost, wind, snow and prolonged cool conditions. Although moisture-loving, it performs best where drainage is excellent and the soil never becomes stagnant.

Endemic distribution:
Endemic to New Zealand. Found throughout the South Island, Stewart Island/Rakiura, the Auckland Islands and Campbell Island/Motu Ihupuku.

Height:
1–12 m

Width:
1–4 m

Flowering:
October–March

Fruiting:
Fruit may be present throughout the year.

Uses:
• Montane and subalpine restoration
• Coastal and exposed landscape planting
• Specimen shrub or small tree
• Native shelter planting
• Botanical collections
• Wildlife habitat

Appearance:
Growth habit:
An erect, single-stemmed shrub or small tree with slender ascending branches. Older specimens often develop an open crown with numerous fine branchlets bearing dense terminal tufts of foliage. Branches become distinctly ringed with the scars of fallen leaves.

Trunk/Bark:
The bark is grey to dark brown or almost black, becoming finely to deeply fissured with age. Young stems are smooth and reddish-brown.

Juvenile leaves:
Juvenile plants bear long, broad, linear-triangular to lance-shaped leaves that may reach 10–25 cm in length and 2.5–7 mm in width. They are bright green, strongly striated and finely serrated along the margins.

Adult leaves:
Adult foliage consists of stiff, erect to spreading leaves 4–23 cm long and 1–6 mm wide. They are linear, sharply pointed and prominently striated, with finely serrated margins and broad sheathing bases that clasp the stems. Leaf colours range from fresh green to bronze, orange or brown, particularly in exposed alpine environments.

Flowers:
Small white flowers are carried in dense terminal racemes 2.5–5.5 cm long that are initially upright before becoming gracefully drooping. Each flower spike carries five to eighteen flowers with broad, ciliate bracts that fall early in development.

Fruit:
The fruit is a light brown, rounded capsule approximately 3.5–4 mm across, borne on a short stalk and containing numerous tiny seeds.

Seeds:
Seeds are minute, light brown and slightly reticulated. They are dispersed by wind.

Ecology:
Inaka is an important structural species across a remarkable range of habitats, from coastal bluffs to alpine shrublands. It provides shelter for native insects, small birds and epiphytic plants while helping stabilise exposed slopes and peaty soils. The lightweight seeds are readily dispersed by wind, allowing the species to colonise open sites following disturbance.

Its long lifespan, which may exceed 200 years, makes it an important long-term component of many southern forest and shrubland ecosystems.

Associated habitats:
Beech forest margins, mixed podocarp-hardwood forest, shrublands, peat bogs, alpine scrub, mountain ridges, coastal cliffs, bluffs and subantarctic herbfields. It commonly grows alongside mountain beech, kāmahi, mountain tōtara, leatherwood, snow tussocks, Coprosma species and other Dracophyllum species.

How to grow:
Plant in full sun or light shade in acidic, organic-rich, well-drained soil. Keep plants evenly moist during establishment and mulch to retain soil moisture while maintaining an acidic root environment. It is highly tolerant of frost and wind but performs poorly in hot, humid districts or on alkaline soils.

Growth is relatively slow, and plants dislike root disturbance once established.

Propagation:
Propagation is generally from fresh seed, although germination can be slow and variable. Young seedlings require cool, moist conditions with excellent drainage. Plants should only be obtained from reputable nurseries, as wild-collected specimens rarely establish successfully and should never be removed from natural populations.

Cultural use:
Known traditionally as inaka, this species is an iconic member of New Zealand’s southern mountain flora. The genus name Dracophyllum means “dragon leaf”, reflecting the striking resemblance of its foliage to that of dragon trees.

Garden value:
An elegant architectural shrub or small tree that brings year-round structure to cool-climate native gardens. Its fine foliage, attractive white flower spikes, exceptional longevity and tolerance of harsh alpine and coastal conditions make it a valuable specimen for restoration projects and specialist native plant collections.