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
mat-forming perennial, often in dense colonies that exclude all
other vegetation. Each flower stalk carries one large yellow composite
flower head. The leaves have long hairs on the upper surface, and
are downy white with star-shaped hairs on the undersides.
Lemon-yellow, about 3 cm in diameter, solitary on leafless stalks.
The florets often have a red stripe the on outer surface. Flowers
Purplish-black achenes, about 2 mm by 0.5 mm, with off-white,
simple brittle pappus hairs 5-6 mm long in a single row.
Dense rosette leaves are 5-8 cm long, almost entire, bluish-green.
Leaves with scattered long hairs about 5 mm long on the upper
surface, white with dense star-shaped hairs on undersides.
Slender, unbranched flower stalks 10-25 cm tall and slender, creeping,
hairy stolons spreading along the ground surface.
Creeping underground rhizomes.
and dry pasture land, river flats and terraces, road-sides and
Increasing in NI in
Rotorua, Volcanic Plateau, Lake Waikaremoana, Kaimanawa and Ruahine
Ranges and in Hawkes Bay. Common throughout SI and, except for
Nelson, abundant in upper Waitaki Valley. Originally from Europe,
north and central Asia.
A major weed of SI
High Country pastures. Can be controlled by pasture improvement.
Separated from other, similar species, by its large, solitary,
pale yellow flowers and dense star-shaped hairs on stolons and
undersides of leaves. Subject to Pest Plant Management Strategies
in one or more regions. Check with the regional council for details.
of botanical name
from the Gr. name for hawk, since Pliny, the Roman naturalist
believed hawks ate the plant to strengthen their eyesight; pilosella
(Lat.) = with short soft hairs.