Species

Calystegia sepium subsp. roseata

Etymology

Calystegia: Name is derived from the Greek words kalyx 'cup', and stege 'a covering', meaning 'a covered cup', the calyx of some bindweeds being enclosed in two bracts.

Common Name(s)

pink bindweed

Current Conservation Status

2012 - Not Threatened

Conservation status of New Zealand indigenous vascular plants, 2012
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2012 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2009 and replaces all previous NZTCS lists for vascular plants. Authors: Peter J. de Lange, Jeremy R. Rolfe, Paul D. Champion, Shannel P. Courtney, Peter B. Heenan, John W. Barkla, Ewen K. Cameron, David A. Norton and Rodney A. Hitchmough. File size: 792KB

Previous Conservation Status

2009 - Not Threatened
2004 - Not Threatened

Authority

Calystegia sepium subsp. roseata Brummitt

Family

Convolvulaceae

Flora Category

Vascular - Native

NVS Species Code

CALSSR

The National Vegetation Survey (NVS) Databank is a physical archive and electronic databank containing records of over 94,000 vegetation survey plots - including data from over 19,000 permanent plots. NVS maintains a standard set of species code abbreviations that correspond to standard scientific plant names from the Ngä Tipu o Aotearoa - New Zealand Plants database.

Structural Class

Dicotyledonous Lianes and Related Trailing Plants

Synonyms

Has been referred to in New Zealand as Calystegia sepium subsp. sepium - which does not occur in New Zealand at all.

Distribution

Indigenous. New Zealand, Three Kings, North, South, Stewart and Chatham Islands, Indigenous throughout the southern hemisphere

Habitat

A weedy species of coastal and lowland successional habitats, which very rarely extends to montane forest. Often found along the margins of wetlands. Pink bindweed has also spread into urban areas where it can be very aggressive.

Features

Summer-green, rhizomatous vine, all parts exuding white latex. Roots thickened, white. Stems glabrescent, purple, purple-red. Leaves membranous, dark to yellow-green 30-140(-170) x 25-90(-110) mm, usually narrowly triangular, sagittate, with or without tails, sinus deeply cleft to rounded. Flowers solitary; peduncles 30-120 mm long, glabrescent, ridged or narrowly winged. Bracts 12.5-30 x 10-15 mm, broad-ovate, base rounded or cordate, apex obtuse and mucronate, Sepals 120-150 mm, lanceolate-ovate. Corolla (30)-50(-70) mm long, limb 40-60 mm diam., pink to dark-pink with white mid-petaline bands. Stamens 20-25 mm long. Stle > stamens. Capsules papery, subglobose, c.10 mm diam. Seed triangular-ovoid, dark brown to almost black.

Similar Taxa

Calystegia silvatica Griseb. which differs by the broadly triangular-ovate, dark green leaves without sagittate tails, overlapping (imbricate) floral bracts, much larger white flowers, and wider corolla limb > (55-) 60 mm in diameter. The F1 hybrid between these two taxa have pale pink-white striped flowers

Flowering

September - April (-June)

Flower Colours

Red / Pink,White

Fruiting

October-August

Propagation Technique

Easy from seed, layered pieces and from the root stock. Very aggressive and weedy. Not suitable for cultivation

Threats

Not Threatened

Chromosome No.

2n = 22

Endemic Taxon

No

Endemic Genus

No

Endemic Family

No

Life Cycle and Dispersal

Capsules are water and possibly also wind dispersed (Thorsen et al., 2009).

Where To Buy

Not commercially available - very weedy

Taxonomic Notes

Calystegia sepium subsp. roseata was first collected from New Zealand by Banks & Solander in 1769 (see the original specimens by following the Te Papa link on the left hand side of the fact sheet). It should be regarded as indigenous (R. K. Brummitt pers. comm.). Confusion with C. sepium (L.) R.Br. subsp. sepium and its introduced status has arisen through its widespread hybridism with the introduced greater bind weed C. silvatica Griseb., and the apparent failure to recognise that hybrid in this country. Indeed most urban gatherings are of that hybrid. Calystegia sepium subsp. roseata and C. silvatica have very distinctive nrDNA ITS sequences from which the hybrid between them can easily be detected. There is not bona fide Calystegia sepium subsp. sepium in New Zealand (R. K. Brummitt pers. comm.)

Attribution

Fact sheet prepared for NZPCN by P.J. de Lange 1 November 2005. Description adapted from Allan (1961) and Webb et al. (1988), supplemented with observations made from fresh and dried material.

References and further reading

Allan, H.H. 1961: Flora of New Zealand. Vol. I. Wellington, Government Printer.

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

Webb, C.J.; Sykes, W.R.; Garnock-Jones, P.J. 1988: Flora of New Zealand. Vol. IV. Naturalised Pteridophytes, Gymnosperms, Dicotyledons.Christchurch, New Zealand, Botany Division, D.S.I.R..

This page last updated on 12 Nov 2014