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Wahlenbergia: Named in honour of Wahlenberg, a Swedish botanist and author of A Botany of Lapland.
Coastal Harebell, Glossy Harebell
Current Threat Status
2012 - Not Threatened
Previous Threat Status
2009 - Not Threatened
2004 - Not Threatened
Wahlenbergia vernicosa J.A.Petterson,
Vascular - Native
Wahlenbergia colensoi N.E.Br. pro. parte.,
Wahlenbergia littoricola subsp. vernicosa (J.A.Petterson) de Lange et E.K.Cameron
Indigenous. New Zealand: Kermadec, Three Kings, North Island and Chatham Islands. Also eastern Australia, Tasmania, Norfolk Island, and possibly the Tongan Islands
Coastal cliffs and islets, typically associated with seabird nesting sites, also volcanic and limestone outcrops both inland and near the sea.
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.
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)
October to May
Main Flower Colour
Other Flower Colour
Violet / Purple
November - June
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.
2n = 54
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