Monday, June 19, 2017

Iris: a rainbow of blues



There are many species of Iris, some are bulbous others have rhizomes. All have colourful flowers in every colour imaginable, ranging from white to almost black, from pink to red to purple to lilac to blue, but also yellows and oranges. It is therefore very fitting that this genus of plants was named after the personification of the rainbow,  Iris, messenger of the gods. There are some 300 wild species within the genus Iris, and many, many hybrids have been recorded as these plants are universally seen as beautiful and symbolic.



Iris siberica, grows throughout eastern and central Europe into Asia, so not merely in Siberia as the name suggests. These plants are grown in temperate regions as ornamentals. In the wild the colour can vary from violet via dark blue to a pale almost white icy blue. They grow best on slightly moist meadows.



The bearded irises are a section of iris with -as the name suggests- a tufted hairy section on each fall. These examples are all hybrids known as Iris x germanica. This German iris is not a true wild species but a long cultivated descendent of several wild species. The large blooms come in every colour, but I prefer the blues. These plants like dry stony soil and lots of sunlight.



The variety in Iris is immense. On the left the lovely Iris laevigata 'Variegata'. This Water iris comes from Japan and will even grow in shallow water. The pale blue flowers of Iris x hollandica, commonly known as Dutch iris, are again beardless. These hybrids arose from crossing Iris xiphium (Spanish iris) with Iris tingitana (Tangiers iris). These plant require free draining growing conditions. Iris graminea grows from rhizomes and has violet blue flowers amongst the grasslike leaves. It is native north of the Mediterranean Sea  into the Caucasus.

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