- Taxon
- Weed
Classification
Class
Family
Genus
Subordinate Taxa
Nomenclature
Scientific Name:
Calystegia silvatica (Kit.) Griseb. (1844)
Synonymy:
- ≡ Convolvulus silvaticus Kit. (1805)
- ≡ Calystegia sylvestris (Waldst. & Kit. ex Willd.) Roem. & Schult., Syst. Veg. (ed. 16) [Roemer & Schultes] (1819)
- = Convolvulus sylvestris Waldst. & Kit. ex Willd.
Vernacular Name(s):
great bindweed; Greater bindweed
Description
Rhizomes extensive and far-creeping. Stems glabrous, vigorously twining, often tinged purple where exposed to sunlight. Petioles 3–11 cm long, usually glabrous, sometimes hairy. Lamina 5–18 × 3.5–15 cm, triangular-ovate, sagittate-ovate or hastate, usually glabrous; base deeply cordate with rounded sinus and 1–2 small lobes on each side; apex acute to acuminate. Fls solitary; peduncles 8–20–(30) cm long, usually narrowly winged. Bracts at anthesis imbricate, 2–3.4 × 1.8–3.6 cm, broad-ovate, slightly > calyx; base cordate; apex acute to mucronate. Sepals 1.5–1.8 cm long, ± ovate-lanceolate. Corolla 5.2–8 cm long and 5.5–8 cm diam. across limb, usually white, very rarely pale pink; lobes very shallow and inconspicuous; mid-petaline area of tube shining outside. Stamens c. 3 cm long; filaments with glandular hairs in lower 1/2. Ovary 1-locular. Style glabrous, = or slightly > stamens. Capsule 1–1.5 cm long, subglobose. Seeds 4–5 mm diam., ± triangular-ovoid with rounded outer surface and slightly concave inner faces, smooth, black.
[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]
Biostatus
Exotic
| Category | Number |
|---|---|
| Exotic: Fully Naturalised | 1 |
| Total | 1 |
Phenology
Flowering: Oct.–May.
Bibliography
Biosecurity New Zealand 2012: Regional Pest Management Strategies Database. http://www.biosecurityperformance.maf.govt.nz/
Brummit, R.K. 1972: Calystegia R.Br. In: Tutin, T.G.; Heywood, V.H.; Burges, N.A.; Moore, D.M.; Valentine, D.H.; Walters, S.M.; Webb, D.A. (ed.) Flora Europaea. Vol. 3. Diapensiaceae to Myoporaceae. Cambridge University Press, Cambridge. 78–79.
Howell, C. 2008: Consolidated list of environmental weeds in New Zealand. DOC Research & Development Series 292: 42.
Ogden, J. 1978: Variation in Calystegia R. Br. (Convolvulaceae) in New Zealand. New Zealand Journal of Botany 16: 123–140.
Roemer, J.J.; Schultes, J.A. 1819: Systema vegetabilium. Vol. 4. Edition 16.
