Common names:
Dutch Iris
Iris

Data specific to Irises (Edit)
Classification:Spuria

General Plant Information (Edit)
Life cycle:Perennial
Minimum cold hardiness:Zone 4b -31.7 °C (-25 °F) to -28.9 °C (-20 °F)
Maximum recommended zone:Zone 4b
Flowers:Nocturnal
Conservation status:Endangered (EN)

photo from the 1935 catalog, Carl Salbach, Berkeley, California

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