Sea urchin hakea (Hakea petiolaris)
Description
Hakea petiolaris grows as a tree or shrub up to 9 metres (30 ft) in height. The leaves have a distinctive pale-grey colour and are 5.5 to 15 cm long and 2.5 to 6 cm wide. Flowering occurs in autumn and winter (March to July), the inflorescences appearing on small branches or forks of branches. They are roughly spherical and contain 120 to 200 individual flowers. The pistils are 1.4 to 1.8 cm long and white or cream in colour. The perianth ranges from pink to purple. Flowering is followed by woody seed capsules which are 2 to 3.5 cm long and 1 to 2 cm wide. Each splits into valves and releases 2 dark brown or black winged seeds. Response to fire is varied, with some forms resprouting from a lignotuber and others being killed and regenerating from seed.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum:
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Class: Magnoliopsida
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Order: Proteales
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Family: Proteaceae
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Genus: Hakea
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