Sand Bidibid

Botanical name: Acaena pallida

Synonyms: None

Common name(s): Sand Bidibid, Sand Piripiri, Pale Bidibid

About:
A vigorous coastal ground cover with glossy bright green foliage and distinctive red hooked seed heads. Specially adapted to life on sandy coastlines, this fast-spreading species forms extensive mats that stabilise dunes and protect vulnerable coastal soils from erosion. Its excellent tolerance of salt spray, wind and drought makes it one of New Zealand’s best native plants for coastal restoration.

Natural habitat:
Restricted to coastal fine gravels, sandy beaches, foredunes, back dunes and other coastal dune systems.

Growing environment:
Coastal, Salt, Sun, Wind & Free draining tolerant.

Endemic distribution:
Native to New Zealand, south-eastern Australia and Tasmania.

In New Zealand it occurs naturally in the southern North Island, South Island, Stewart Island / Rakiura and the Chatham Islands.

Height:
Approximately 15 cm tall

Width:
Spreading up to 2 m or more

Flowering:
October – January

Produces rounded white flower heads.

Fruiting:
October – May

Develops bright red hooked burrs that mature to pale brown or golden-brown.

Uses:
• Coastal ground cover
• Sand dune stabilisation
• Erosion control
• Coastal restoration planting
• Revegetation projects
• Weed suppression

Appearance:

Growth habit:
A vigorous trailing perennial that spreads rapidly by creeping stolons which root freely at the nodes, forming extensive loose mats across sandy ground.

Leaves:
Glossy bright green, pinnately divided leaves with 9–15 bluntly toothed leaflets. The upper surface is smooth and shiny, while the underside is pale and softly hairy.

Flowers:
Small rounded white flower heads are produced on upright, hairy stems that rise above the foliage during spring and early summer.

Fruit:
Distinctive cone-shaped burrs with long, bright red hooked spines develop after flowering. These readily attach to fur, feathers and clothing before maturing to pale brown or golden-brown, allowing effective seed dispersal.

Ecology:
Sand Bidibid is an important pioneer species of coastal ecosystems. Its dense network of creeping stems helps trap drifting sand, stabilise dunes and reduce erosion caused by wind and waves. The flowers provide nectar and pollen for native insects, while the extensive mats create habitat for small coastal invertebrates.

Associated habitats:
Coastal sand dunes, foredunes, back dunes, sandy beaches, coastal gravels, dune slacks and open coastal herbfields.

How to grow:
Plant in full sun in very free-draining sandy or gravelly soils. It thrives in exposed coastal sites where many other plants struggle and requires little maintenance once established. Highly tolerant of salt spray, drying winds and prolonged dry periods.

Propagation:
Easily propagated from fresh seed, division or rooted runners. Plants establish rapidly from creeping stems and are ideal for large-scale coastal restoration projects.

Cultural use:
Known traditionally as Sand Piripiri, the hooked burrs naturally disperse by attaching to birds, animals and people, helping the species colonise shifting coastal environments.

Garden value:
An outstanding native ground cover for coastal gardens and exposed landscapes. Its glossy foliage, colourful burrs and exceptional tolerance of harsh seaside conditions make it one of the best species for stabilising dunes, suppressing weeds and creating resilient coastal plantings.