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 An
Illustrated Guide to
Common Weeds
of New Zealand
Rhamnus
alaternus
evergreen
buckthorn
Family
RHAMNACEAE
 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
Evergreen shrub
up to 5 m tall, or stunted in exposed sites.
- Flowers Green,
small, fragrant, 3-4 mm in diameter, with no petals. Usually in
hairy, scale-leaved racemes or panicles. The turned-back calyx
lobes are usually red-edged. Flowers May-Nov.
- Fruit Glossy
dark red, egg-shaped drupes to 7 mm long, turning black.
- Leaves Leathery,
glossy on the top surface. Elliptical or egg-shaped, up to 6 cm
long by 3 cm wide. Leaves entire or with teeth that can be blunt
or sharp toothed.
- Stems Young
shoots purplish, angled, hairy.
Habitat
Scrub, forest margins
and plantations.
Distribution
Common in and around
Auckland City and Hauraki Gulf islands, decreasing southwards
in NI. Occasional in Marlborough, Canterbury and Otago in SI.
Originally from the Mediterranean.
Comments
A serious weed in some
areas, such as on Rangitoto Island. Listed on the National
Pest Plant Accord (see Introduction for details).
Derivation
of botanical name
Rhamnus Gr.
name for a shrub; alaternus Lat. name.
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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