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  4. Calystegia silvatica subsp. disjuncta

Calystegia silvatica subsp. disjuncta

Hutt Valley.<br>Photographer: Jeremy R. Rolfe, Date taken: 11/02/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Involucral bracts overlapping. Hutt Valley.<br>Photographer: Jeremy R. Rolfe, Date taken: 06/01/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Hutt Valley.<br>Photographer: Jeremy R. Rolfe, Date taken: 11/02/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Paraparaumu.<br>Photographer: Jeremy R. Rolfe, Date taken: 21/02/2015, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Hutt Valley.<br>Photographer: Jeremy R. Rolfe, Date taken: 11/02/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
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Common name

great bindweed

Family

Convolvulaceae

Authority

Calystegia silvatica subsp. disjuncta Brummit

Flora category

Vascular – Exotic

Structural class

Lianes & Related Trailing Plants - Dicotyledons

Habitat

Terrestrial. Gardens, waste places, forest edges, roadsides etc

Features

Perennial herb with extensive and far creeping white rhizomes. Vigorously twining glabrous stems, to 2m or more. Lamina usually glabrous, dark green, triangular-ovate, sagiittate or hastate, base deeply cordate with rounded sinus. Flowers always singly, peduncles usually 8-20cm long. 2 large overlapping bracts at base of flower, enclosing the sepals. Corolla usually 5-8cm long almost always pure white, usually funnel-shaped. Capsule 1-1.5cm rounded and brown, with triangular-ovoid black seeds (Webb et al 1988 with additions from Melanie Newfield).

Similar taxa

Distinguished by the dark green, glabrous leaves, large pure white flowers and large overlapping bracts at the base of the flowers. Hybridises freelly with the indigenous C. sepium subsp. roseata, F1 hybrids can be detected by their pale pink, white-striped flowers. C. sepium (L.) R.Br. subsp. sepium is not present in New Zealand.

Flowering

October, November, December, January, February, March, April, May

Flower colours

White

Year naturalised

1904

Origin

S. Europe

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.

Reason For Introduction
Accidental

Reproduction
Seed, rhizome.

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