Classification
Class
Magnoliopsida Brongn.
Order
Solanales Juss. ex Bercht. & J.Presl
Family
Convolvulaceae
Genus
Calystegia R.Br.
 Nomenclature
Scientific Name:
Calystegia tuguriorum (G.Forst.) R.Br. ex Hook.f., Bot. Antarct. Voy. II (Fl. Nov.-Zel.) Part II, 183, t.47 (1854)
Synonymy:
  • ≡ Convolvulus tuguriorum G.Forst. in Forster, Fl. Ins. Austr. 14 (1786)
  • = Convolvulus truncatella Colenso, Trans. & Proc. New Zealand Inst. 21: 95 (1889)
Vernacular Name(s):
Climbing convolvulus; New Zealand bindweed; Pōuwhiwhi; Pōwhiwhi; Rarotawake
 Description

Rhizomatous perennial with slender, much-branched, glabrous or puberulent, climbing stems. Petioles to c. 4 cm long, slender. Lamina (1)–2–4–(5) × (1.5)–2–3–(4) cm, broad-ovate to deltoid or reniform, entire or sinuate; base cordate, usually with shallow, broad sinus; apex acute to acuminate. Peduncles (3)–4–11 cm long, generally > lvs, terete or slightly winged. Bracts broadly ovate to suborbicular; base cordate; apex apiculate. Sepals similar to and < to somewhat > bracts. Corolla (2.5)–3–5 × (3)–4–6 cm diam., funnelform, usually white, sometimes pink. Ovary imperfectly 2-locular. Capsule 8–12 mm long, excluding apiculus, broad-ovoid. Seeds orange, smooth.

[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]

 Biostatus
Indigenous (Non-endemic)
 Phenology

Flowering: Sep.–Mar.

 Bibliography
Colenso, W. 1889: A description of some newly-discovered Phænogamic plants; being a further contribution towards the making known the botany of New Zealand. Transactions and Proceedings of the New Zealand Institute 21: 80–108.
de Lange, P.J.; Rolfe, J.R.; Barkla J.W.; Courtney, S.P.; Champion, P.D.; Perrie, L.R.; Beadel, S.N.; Ford, K.A.; Breitwieser, I.; Schönberger, I.; Hindmarsh-Walls, R.; Heenan, P.B.; Ladley, K. 2018: Conservation status of New Zealand indigenous vascular plants, 2017. New Zealand Threat Classification Series. No. 22. [Not Threatened]
de Lange, P.J.; Rolfe, J.R.; Champion, P.D.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Norton, D.A.; Hitchmough, R.A. 2013: Conservation status of New Zealand indigenous vascular plants, 2012. New Zealand Threat Classification Series 3. Department of Conservation, Wellington. [Not Threatened]
Forster, J.G.A. 1786: Florulae Insularum Australium Prodromus. Dietrich, Göttingen.
Hooker, J.D. 1854–1855: The Botany of the Antarctic Voyage of H.M. Discovery Ships Erebus and Terror, in the years 1839–1843, under the command of Captain Sir James Clark Ross. II. Flora Novae-Zelandiae. Part II. Flowerless plants. Lovell Reeve, London.