Definitions
from The Century Dictionary.
- noun A genus of plants of the order Compositæ, the tribe Asteroideæ, and the subtribe Heterochromeæ.
from the GNU version of the Collaborative International Dictionary of English.
- proper noun A large genus of Australian evergreen shrubs or small trees with large daisylike flowers.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun large genus of Australian evergreen shrubs or small trees with large daisylike flowers
Etymologies
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Examples
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The flora of this island shows some relationship to that of New Zealand, and includes the genera Hebe, Olearia, Haloragis, and Corokia.
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Site characteristics and population structure of the endangered shrub Olearia polita, Wilson et Garnock Jones, Nelson, New Zealand.
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Of particular conservation importance are the magnificent examples of pristine tall forests, with eucalyptus such as swamp gum Eucalyptus regnans (the world's tallest flowering plant) forming a 60-90 m high canopy over a 10-20 m high closed wet sclerophyll understorey of Olearia argophylla, Pomaderris apetala, Acacia dealbata and Acacia melanoxylon.
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Gigantism is common and examples include: Chatham Islands karamu (Coprosma chathamica) and the tree koromiko (Hebe barkeri), both of which are the largest species in their genera; and the akeake (Olearia traversii), one of the largest tree daisies on earth.
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There are more than 50 other tree and shrub species in the forest, including Senecio spp., daisy-trees (Olearia spp.), and Coprosma spp.
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Rainforest vegetation is extremely sensitive to fire, so that where fire frequency is increased, old, mature eucalypts stand over a tall understory of Acacia spp. and mesophyll species of Olearia, Bedfordia, Pomaderris, and Phebalium.
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The Snares have extensive forests dominated by a tree daisy Olearia lyalli up to 5 m high.
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On the main island of the Snares, Hebe elliptica grows around coastal fringes, while Olearia lyallii forms central stands reaching up to 9 m in height.
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Threatened plant species currently being protected or monitored include the endemic saltpan cresses (Lepidium kirkii and L. sisymbrioides matau), the upland shrub Hebe cupressoides, the endangered Hector's tree daisy (Olearia hectorii), native Peraxilla mistletoes, and the epiphytic forest shrub Tupeia antarctica.
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One of the Department of Conservation's priority species for conservation protection, the South Island tree daisy (Olearia hectori EN), is found in shrub lands outside existing protected areas.
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