Illustrated Guide to
of New Zealand
Weeds of New Zealand
by Ian Popay, Paul Champion & Trevor James
ISBN 0 473 09760 5
by kind permission of the
Zealand Plant Protection Society
Publication or other use of images or descriptive
text on these pages is unauthorised unless written permission is
obtained from the authors and publisher.
of the publication Common Weeds of New Zealand must always
Available from Touchwood
rhizomatous, semi-tropical perennial herb up to 2 m tall, with magnificent
display of large, conspicuous yellow flowers in late summer, followed
by scarlet seeds in capsules. Major problem of conservation areas
in Auckland and further north.
- Flowers Pale
lemon-yellow with conspicuous red stamens, fragrant, in large
open inflorescence 25-45 cm long. The narrow bracts do not overlap,
and each envelopes two flowers. The corolla tube is about 5 cm
long, with a two-lobed labellum. Flowers Feb-Mar.
- Fruit Three-valved
capsule, 15-18 mm long, orange on the inside, containing numerous
bright scarlet, shining seeds, each 6 x 4 mm.
- Leaves Lance-shaped,
20-45 cm long by 10-15 cm wide, short-stalked, tapering to a point.
- Stems Leafy,
- Roots Large
Road-sides and damp
Common in North Auckland,
very common in and around Auckland City, common in Coromandel
Peninsula, Kawhia, Bay of Plenty, Opotiki, and Gisborne City,
and in Nelson-Buller area in SI. Originally from South Africa.
Listed on the National
Pest Plant Accord (see Introduction for details).
Yellow ginger (Hedychium
flavescens) is somewhat taller, up to 3 m, with off-white
to cream flowers in a cone-like inflorescence, with the bracts
strongly overlapping. Seed is not produced. Common in northern
NI on road-sides, forest margins, stream-sides. This species is
subject to a Pest Plant Management Strategy in Taranaki. Listed
on the National Pest Plant Accord (see Introduction for details).
of botanical name
= sweet snow, meaning the fragrant white flowers of some species;
gardnerianum after Edward Gardner, political resident
On this site
Reproduced from Common Weeds
of New Zealand:
- Weedbusters is a weeds awareness and education programme that aims to
protect New Zealand's environment from the increasing weed problem.
- A free tool to assist farmers and agricultural professionals in decision-making regarding weed and pest identification, biology, impact and management.
- New Zealand Weeds Key
- An interactive identification key to the weeds of New Zealand. Developed at Landcare Research.
Zealand Plant Conservation Network naturalised plants
- Search for information on more than 2500 naturalise and weedy plants.
Zealand Plant Protection Society
- Their main objective: "To pool and exchange information on the biology
of weeds, invertebrate and vertebrate pests, pathogens and beneficial organisms
and methods for modifying their effects."
University Weeds Database
- A site providing information about New Zealand weeds and weed control.
It has a series of pages showing pictures of New Zealand weeds, notes on
identification and control. It also provides information on a university
paper entitled Controlling Weeds.
- Weeds in Australia
- Weeds website of the Australian Government.
Society of Victoria
- Promoting wider awareness and interest in weeds and their management.
Includes a useful page of links
to other weed societies.
Valley Weeds Strategy
- Listing of common and botanical names, images, and information including
control methods for weeds found in Tasmania, and also weeds of national significance.
and Exotic Species of North America
- Images and other information from the University of Georgia.
- Weed-related resources including weed science, practical tools, gardening
tips about controlling weeds, and environmental news updates.
Species Specialist Group
- "The ISSG aims to reduce threats to natural ecosystems and the native
species they contain by increasing awareness of invasive alien species,
and of ways to prevent, control or eradicate them."
- Site that includes a comprehensive collection of weed images from around
on Weeds from FetchBook.Info