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Ptilostemon diacantha (Fishbone thistle )
Other names: Rosette thistle , Cirsium diacantha, Carduus diacanthus, Ivory thistle
P. diacantha is a rosette-forming, evergreen biennial or short-lived perennial with long, narrowly lance-shaped, lobed, spiny, white-veined, grey-green leaves and upright, branching stems bearing clusters of purple, thistle-like flowers in summer.
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0.6m max. spread |
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0.6m max. height |
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5-10 years to maturity |
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