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Iris unguicularis 'Walter Butt' (Algerian iris 'Walter Butt')
Other names: Iris stylosa 'Walter Butt'
'Walter Butt' is a vigorous, rhizomatous, evergreen perennial with narrow, sword-shaped, slightly twisted, dark green leaves and, in late winter, early spring, and occasionally in late autumn, large, lavender-blue to grey flowers with yellow bands in the centre of each petal.
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0.5m max. spread |
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0.3m max. height |
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2-5 years to maturity |
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