Class
Family
Classification
Subordinate Taxa
Nomenclature
Scientific Name:
Polygonum L., Sp. Pl. 359 (1753)
Vernacular Name(s):
Knotweed; Willow weed
Description
Annual or perennial herbs, occasionally small shrubs, sometimes aquatic or ± scrambling; stems usually solid, with nodes usually obviously jointed and often swollen. Lvs cauline, very variable but usually considerably longer than wide, usually entire; ochreae well-developed, scarious. Infl. axillary or terminal, usually a fascicle, spiciform raceme, capitate head, or diffuse panicle; fls generally ☿, sometimes unisexual (plants monoecious or dioecious). Pedicels generally jointed. Perianth segments (4)–5–(6), persistent but usually not markedly accrescent, free or united at base, equal or nearly so, white, pink to crimson, not keeled. Stamens (3)–5–8–(9). Styles 2–3, variable in length. Fr. a biconvex or trigonous nut, enclosed or slightly exserted from the persistent, spineless perianth valves.
[From: Webb et al. (1988) Flora of New Zealand. Volume 4.]
Biostatus
Indigenous (Non-endemic)
| Category | Number |
|---|---|
| Indigenous (Non-endemic) | 1 |
| Exotic: Fully Naturalised | 2 |
| Total | 3 |
Bibliography
Connor, H.E. 1977: The Poisonous Plants in New Zealand. Edition 2. Government Printer, Wellington.
Linnaeus, C. 1753: Species Plantarum. Impensis Laurentii Salvii, Stockholm.
Mabberley, D.J. 2008: Mabberley's plant book, a portable dictionary of plants, their classification and uses. Edition 3. Cambridge University Press.
