purples up the alpine rock garden edges

Size
Height: 5–10 cm
Lifespan
5–10 years
Diet
Not applicable (groundcover). Photosynthetic.
Habitat
Gardens, rock gardens, alpine plantings, banks and containers. Prefers well-drained soils with full sun. Tolerates drought, wind, frost and coastal conditions.
Range
Cultivated throughout New Zealand. Derived from Acaena inermis, which is native to New Zealand (South Island alpine areas). Widely grown for its striking purple foliage.
Endemism
Endemic
Main Threats
No significant conservation threats as this is a cultivated variety. The parent species is not threatened. Hardy and pest-resistant in garden settings. Tolerates drought, wind, frost and coastal conditions.
Population
This is a garden cultivar, not a wild species. It is widely grown in New Zealand gardens for its striking purple foliage. No formal conservation assessment exists for this cultivar.
Conservation Status
Not Threatened
Human Risk
caution
Handling Note
hooked seed cases latch onto skin and clothing, can cause minor lacerations
Conservation Note
Endemic herb; widespread in coastal and lowland habitats throughout New Zealand.
Assessment
NZTCS Vascular Plants (2023)
Te Ao Māori
This cultivar was selected for its purple foliage and spineless burrs. It is named Purple for its colour. It is a favourite for groundcover in difficult sites. The dense growth provides shelter for small insects. It has no traditional Māori significance. As it is a modern cultivar. It represents the adaptation of a native alpine plant for garden use. Bringing colour and texture to difficult sites.
The bank is bare. The purple acaena spreads. Acaena novae-zelandiae is a vigorous, spreading groundcover. It has striking purple-bronze foliage. A plant that paints the ground purple. The leaves are small, fern-like, and deeply divided. Giving them a soft, feathery texture. The colour is most intense in cooler months. When the purple-bronze tones deepen and become more pronounced. In summer, the colour may fade to a greenish-bronze. A plant that changes with the seasons. The plant produces small, burr-like flowers in summer. The flowers are not showy. But they are followed by burrs that can stick to clothing. Unlike other Acaena species, this cultivar has spineless (inermis) burrs. These do not stick. Making it more garden-friendly. A plant that does not cling. Purple Acaena is extremely hardy. Tolerating drought, frost and coastal conditions. It is excellent for covering banks. Suppressing weeds and adding colour contrast to the garden. The vigorous growth allows it to cover large areas quickly. Forming a dense, weed-suppressing mat. A plant that takes over, but in a good way. The cultivar was selected for its purple foliage and spineless burrs. The parent species, Acaena inermis, is native to the alpine areas of the South Island. This cultivar was bred for garden use. Selected for its striking colour and more manageable burrs. To find Purple Acaena is to look in gardens and rockeries throughout New Zealand. It is a plant of cultivation. Not of the wild. The purple-bronze leaves create a bold carpet. A splash of colour in the garden. The bank is bare. The acaena spreads. Purple-bronze and dense. Covering the ground. Suppressing the weeds. It does not know it was bred in a garden. It does not know it has a name. It just spreads. That is what groundcovers do. This is a garden cultivar, not a wild species. It is widely grown in New Zealand gardens for its striking purple foliage. No formal conservation assessment exists for this cultivar. No significant conservation threats. Hardy and pest-resistant in garden settings. Tolerates drought, wind, frost and coastal conditions.