Illustrated Guide to
of New Zealand
(formerly Gnaphalium coarctatum)
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
rosette-forming annual or biennial, distinguished by the stalkiess
leaves, with shiny, hairless upper surfaces and white, woolly-haired
lower surfaces. The leaves die off by the time of flowering. The
small,whitish flower heads are in dense clusters along the erect
Inflorescence an elongated spike of numerous tight clusters of
small, whitish composite flower heads, each about 3 mm across.
Small, minutely-pimpled achenes about 0.6 mm long.
Basal leaves stalkless, broadest towards the tip, 2-11 cm long.
Leaves usually dead at flowering. Lower stem leaves shiny and
hairless on upper surface and densely woolly underneath. Upper
stem leaves smaller, broader, sometimes folded.
Erect or curved upwards at the tips, one or several arising from
Wet or stony sites
in forest margins and clearings, lawns, pasture, cultivation,
river-beds and coastal places. A weed of some crops like asparagus.
NI. Common in Nelson, Marlborough, Westland and Fiordland in SI.
Originally from South America.
Most common of the
naturalised spicate cudweeds.
Several other introduced
cudweeds also occur in similar habitats. Gamochaeta purpurea
(formerly Gnaphalium purpureum) has leaves woolly-hairy
on both surfaces, and is scattered throughout NI. Gamochaeta
simplicicaulis (formerly Gnaphalium simplicicaule)
has thick stems and a leafy inflorescence, occurring north from
Waikato and in the Bay of Plenty. The native Japanese cudweed
Euchiton spaericus (formerly Gnaphalium sphaericum)
has dense, spherical flower heads about 2 cm in diameter, with
four leaves immediately below it, on upright stems about 20 cm
long and is common throughout NZ in lower rainfall (below 1000
of botanical name
(Gr.) = jointed bristles; spicata (Lat.) spike, ear of
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