New Zealand Calceolaria
Botanical name: Jovellana sinclairii
Synonyms: Calceolaria sinclairii
Common name(s): New Zealand calceolaria
About:
An attractive endemic perennial herb or softly woody subshrub with fresh green, softly hairy foliage and delicate sprays of unusual white to pale yellow flowers spotted with purple. Jovellana sinclairii develops into a rounded, spreading plant, with slender stems that initially sprawl before becoming ascending and increasingly woody toward the base with age.
The flowers are particularly distinctive, with the corolla divided into two nearly equal, concave, pouch-like lips. It is one of only two New Zealand species of Jovellana, a small and unusual genus otherwise represented in South America.
Natural habitat:
Occurs locally in coastal to lower montane habitats, particularly in cool, shaded and permanently moist situations.
Typical habitats include shaded stream margins, damp cliff faces and seepages, moist banks and sparsely vegetated damp ground along forest margins.
Growing environment:
Shade, Partial Shade, Moist Soil, High Humidity & Sheltered conditions tolerant.
Prefers a cool, sheltered position with consistently moist, humus-rich but reasonably free-draining soil. Protection from hot afternoon sun and prolonged drying is beneficial.
Endemic distribution:
Endemic to New Zealand.
North Island, occurring locally from around Hicks Bay and East Cape southwards.
Its distribution is characterised by scattered and often isolated populations rather than continuous occurrence.
Height:
Usually approximately 30–80 cm tall, potentially reaching around 1 m under favourable conditions.
Width:
Up to approximately 1.8 m across, forming a broad, rounded and spreading plant.
Flowering:
Primarily spring through summer.
Numerous small flowers are carried on slender, terminal, much-branched panicles that may reach approximately 30 cm long.
Fruiting:
October–February.
Produces small, dry, obovoid capsules containing numerous minute dark reddish-brown seeds.
Uses:
• Shaded native gardens
• Woodland gardens
• Damp banks
• Streamside planting
• Shaded rock gardens
• Native fernery planting
• Containers in sheltered positions
• Specialist native plant collections
• Underplanting beneath taller native shrubs
Appearance:
Growth habit:
A leafy, herbaceous perennial to softly woody subshrub forming rounded, spreading growth.
Stems are slender, green or reddish and loosely branched, initially sprawling before becoming ascending. Individual stems may reach approximately 80 cm long, with their bases becoming woody as plants mature.
Young stems and foliage are variably covered in fine glandular hairs.
Leaves:
Leaves occur in opposite pairs and are relatively thin and somewhat membranous.
The blades are approximately 2–8 cm long and 2–5 cm wide and vary considerably in shape, from narrowly ovate through broadly ovate, ovate-oblong and ovate-elliptic.
Leaves are dark to yellow-green above and lighter green, sometimes pinkish, beneath.
Margins are coarsely crenate-serrate, usually with two or three prominent teeth or lobes on each side. The bases range from broadly wedge-shaped to heart-shaped and sometimes slightly asymmetrical.
Tiny secondary leaflets may occasionally develop in the leaf axils.
Flowers:
The numerous flowers are carried on fine, terminal, usually three-branched panicles.
Individual flowers are approximately 5–10 mm long and have a highly distinctive two-lipped appearance.
The corolla is white, sometimes flushed with yellow, and attractively spotted or marked with purple. It is divided approximately one-third to halfway into two nearly equal, rounded and concave lips.
The calyx is small, approximately 2 mm long, and deeply divided into ovate to triangular lobes.
Fruit:
The fruit is a small, dry, obovoid capsule approximately 3.8–4.2 mm long.
Seeds are extremely small, approximately 0.35–0.6 mm long, dark reddish-brown and elliptic to oblong in shape.
Seeds are primarily dispersed by wind, with water potentially contributing to dispersal in its streamside and seepage habitats.
Ecology:
Jovellana sinclairii occupies specialised cool and damp microsites where reliable moisture and protection from excessive exposure allow its relatively delicate foliage to persist.
Its occurrence beside streams, seepages and shaded forest margins makes it characteristic of transitional habitats between closed forest and permanently moist open ground.
The small, numerous seeds allow colonisation of damp, sparsely vegetated surfaces created by erosion and other natural disturbance.
Its scattered populations also contribute to the distinctive flora of moist North Island forest margins and stream systems.
Associated habitats:
Shaded stream banks, forested gullies, cliff seepages, damp rock faces, moist banks, forest margins and sparsely vegetated wet ground.
It naturally associates with ferns, mosses, liverworts, sedges and moisture-loving shrubs and herbs of shaded lowland and lower montane environments.
How to grow:
Relatively easy to cultivate when its natural habitat is replicated.
Grow in partial to full shade in fertile, humus-rich soil that remains consistently moist but does not become stagnant.
A sheltered position protected from drying winds and intense afternoon sun is preferable.
Regular moisture is particularly important during summer. Mulching with leaf mould or other organic material helps maintain the cool, humid root conditions the species naturally experiences.
Its spreading habit makes it particularly effective planted among ferns and other low-growing woodland species.
Propagation:
Easily propagated from both seed and cuttings.
Fresh seed can be surface-sown onto a fine, moist propagation medium and kept shaded and consistently humid.
Soft or semi-soft stem cuttings can also be taken from healthy actively growing shoots and maintained under humid conditions until rooted.
Established plants may naturally layer where sprawling stems remain in contact with moist soil.
Cultural use:
No specific traditional Māori use is widely documented for Jovellana sinclairii.
The species has considerable botanical significance as one of New Zealand’s two endemic Jovellana species. The genus has an unusual geographic distribution, with its other representatives occurring in Chile, making the New Zealand species particularly interesting from a biogeographical perspective.
Garden value:
An excellent but underused native perennial for cool, shaded and moist gardens.
Its soft green foliage provides attractive ground-level texture, while the fine branching flower stems carry numerous unusual white, yellow-flushed and purple-spotted flowers that give the plant a delicate appearance.
It is especially valuable for shaded ferneries, woodland gardens, damp banks and stream margins where its naturally loose, spreading growth can intermingle with native ferns and other moisture-loving plants.