Wahlenbergia vernicosa

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Species

Wahlenbergia vernicosa

Etymology

Wahlenbergia: Named in honour of Wahlenberg, a Swedish botanist and author of A Botany of Lapland.
vernicosa: Varnished

Common Name(s)

Coastal Harebell, Glossy Harebell

Current Threat Status

2012 - Not Threatened

Previous Threat Status

2009 - Not Threatened
2004 - Not Threatened

Authority

Wahlenbergia vernicosa J.A.Petterson,

Family

Campanulaceae

Flora Category

Vascular - Native

Synonyms

Wahlenbergia colensoi N.E.Br. pro. parte., Wahlenbergia littoricola subsp. vernicosa (J.A.Petterson) de Lange et E.K.Cameron

Distribution

Indigenous. New Zealand: Kermadec, Three Kings, North Island and Chatham Islands. Also eastern Australia, Tasmania, Norfolk Island, and possibly the Tongan Islands

Habitat

Coastal cliffs and islets, typically associated with seabird nesting sites, also volcanic and limestone outcrops both inland and near the sea.

Features

Radicate, biennial to short-lived perennial herb. Root branching, fleshy, brittle. Stems 0.1-1.5 m tall, fleshy and brittle in life, juveniles with opposite leaves, adult plants with mostly alternate sessile leaves, some stems and laterals with lower leaves opposite. Branches often closely divaricating, young shoots hairy, with crowded leaves. Leaves usually elliptic to oblanceolate, 10-40 × 5-10 mm, regularly and closely serrate, glabrous, bright green, fleshy and glossy as if varnished (in life), sparsely hairy, with prominent midrib below; sometimes linear, entire. Flowers in different populations may be white, pastel Lilac, or flax blue, on short slender pedicels 20-70 mm long. Corolla campanulate, 10-20 mm diam., 9-12 mm long, tube cylindrical (cup-shaped), 2 × 2 to 4 × 4 mm, lobes 5 × 4 to 8 × 5 mm, oblong, subacute, spreading; style protruding slightly from tube, slightly thickened in upper half, white. Stigmas 3 or 4, small. Calyx lobes glabrous, 3 × 1 to 4.0 × 1.5 mm, narrowly triangular, becoming radiate or recurved in fruit. Capsule glabrous, obconic, 6 × 4 to 10 × 5 mm, flat-topped or slightly concave at the top, valves flat until ripe. Self-fertile. Seeds 0.5 mm long.

Similar Taxa

Easily distinguished from the other radiate New Zealand Wahlenbergia by the usually much larger size, glossy leaves, pale flax blue, pale lilac, or pure white campanulate flowers with cup-shaped tube and spreading lobes, flat-topped or dish-topped obconic capsules with radiating or recurved calyx lobes. (These appear somewhat twisted or curly in dried specimens), and unusual chromosome number (2n = 54 cf. 2n = 72 in the other radicate species)

Flowering

October to May

Main Flower Colour

White

Other Flower Colour

Violet / Purple

Fruiting

November - June

Propagation Technique

Easily grown from fresh seed and rooted pieces. Does best in a sunny situation in well drained soil. In suitable conditions it freely naturalises and can even become weedy.

Threats

Not Threatened

Chromosome No.

2n = 54

Endemic Taxon

No

Endemic Genus

No

Endemic Family

No

Where To Buy

Not Commercially Available

References and further reading

Petterson, J.A. 1997: Revision of the genus Wahlenbergia (Campanulaceae) in New Zealand. New Zealand Journal of Botanv 35: 9-54.

Thorsen, M. J.; Dickinson, K. J. M.; Seddon, P. J. 2009. Seed dispersal systems in the New Zealand flora. Perspectives in Plant Ecology, Evolution and Systematics 11: 285-309

This page last updated on 27 Apr 2017

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