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 An
Illustrated Guide to
Common Weeds
of New Zealand
Salix
cinerea
grey
willow
Family
SALICACEAE
Reproduced from
Common
Weeds of New Zealand
by Ian Popay, Paul Champion & Trevor James
ISBN 0 473 09760 5
by kind permission of the
New
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.
Appropriate acknowledgement
of the publication Common Weeds of New Zealand must always
be given.
Available from Nationwide Book Distributors
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Shrub or small tree up to 7 m high, but often only 1-2 m.
Catkins appear in spring, before the leaves. Leaves shiny
on the upper surface, covered with soft grey hairs underneath.
Often forms the dominant vegetation in swampy areas.
- Flowers
Catkins appear in spring before the leaves. Separate
male and female catkins, each cylindrical, 15-35 mm long.
Flowers Sep-Oct.
- Fruit
Capsule with two valves, containing many tiny seeds.
- Leaves
Shining on upper surface, grey underneath due to
cover of soft grey hairs. Leaves 2-7 cm long by 15-35 mm
wide. Leaves not bitter to the taste.
- Stems
Bark rather smooth. Shoots not brittle. They are
grey or greenish-grey and remain hairy, or are reddish to
dark purple and often become smooth.
Habitat
Swamps, river-banks
and wet areas behind coastal dunes.
Distribution
In many places
from North Auckland southwards, especially Waikato, Bay
of Plenty and the east of SI. Originally from Europe, western
Asia, north Africa.
Comments
Introduced in
the early period of European settlement and widely planted
in many wet areas for soil reclamation and stabilisation.
Often forming the dominant vegetation in swampy areas. Listed
on the National Pest Plant Accord
(see Introduction for details).
Derivation
of botanical name
Salix (Lat.)
= willow; cinerea (Lat.) = ash-coloured.
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Web-notes:
Weed Links
On this site
Reproduced from Common Weeds
of New Zealand:
External Links
 Weedbusters
New Zealand
- Weedbusters is a weeds awareness and education programme that aims to
protect New Zealand's environment from the increasing weed problem.
- AgPest
- 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.
New
Zealand Plant Conservation Network naturalised plants
- Search for information on more than 2500 naturalised and weedy plants.
 New
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."
-
 Massey
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.
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