Yellow Mistletoe

Botanical name: Alepis flavida

Common name(s): Yellow mistletoe, Pirita, Piriraki

Plant facts:

Alepis flavida is New Zealand’s only species within the endemic genus Alepis. This striking semi-parasitic mistletoe grows high in the outer branches of native forest trees, especially beech species. It becomes most noticeable during flowering when masses of bright orange-yellow tubular flowers appear across the canopy or scatter beneath host trees.

Natural habitat:

Typically found growing on native beech forests, especially black beech (Fuscospora solandri) and mountain beech (Fuscospora cliffortioides), though it has been recorded from at least 13 native host species.

Growing environment:

Cool forest environments, montane forest margins, well-drained native forest ecosystems, partial shade.

Endemic distribution:

Endemic to New Zealand, occurring throughout both the North and South Islands, though naturally uncommon in the North Island.

Growth habit:

Semi-parasitic shrub forming spreading clumps up to approximately 2 m across within the canopy of host trees.

Foliage:

Leaves are thick, leathery, dull green and arranged in opposite pairs. They are oblong to narrow-oval with distinctive rough red margins and visible veins beneath. Leaf tips are deciduous.

Flowers:

Bright orange-yellow to golden-yellow tubular flowers with erect form and prominent orange anthers. Flowers split and curl backward when fully open.

Flowering period:
December – February

Fruit:

Produces small translucent berries that ripen yellow, gold, green, or orange.

Fruiting period:
From January onward

Ecology:

An important native forest species associated with bird pollination and seed dispersal. Bellbirds are key dispersers in the North Island. Like many New Zealand mistletoes, it depends on healthy mature forest and intact bird populations.

Similar species:

Can be confused with the red mistletoes Peraxilla colensoi and Peraxilla tetrapetala, however Alepis flavida differs by:

• Yellow to orange flowers rather than red
• Oblong leaves with red margins
• Disc-like attachment structures
• Growth mainly on outer branches rather than trunks

Threats:

This species is currently classified as At Risk – Declining. Main threats include:

• Possum browsing
• Habitat loss
• Loss of mature host trees
• Fire
• Vegetation succession
• Fungal diseases
• Collection pressure

How to grow:

Difficult to cultivate due to its parasitic nature. Seed must be attached to suitable living host branches shortly after harvest. Germination and establishment are heavily dependent on appropriate host species and humid forest conditions.

Best suited to ecological restoration and conservation plantings where mature native host trees are already established.

Uses:

• Native forest restoration
• Biodiversity enhancement
• Bird habitat planting
• Conservation collections
• Ecological education

Conservation significance:

One of New Zealand’s most distinctive native mistletoes and an important component of healthy beech forest ecosystems. Flowering displays are highly attractive to native birds and insects and are considered one of the iconic seasonal features of South Island beech forests.