This section is from the book "The Wild Garden", by W. Robinson. Also available from Amazon: William Robinson: The Wild Gardener.
These plants, once so well known in our gardens. rivalling (or rather exceeding) the lilies in beauty, are varied and numerous enough to make a wild garden by themselves. The many beautiful varieties of germanica will grow in almost any soil, and may be used with good effect in woods, copses, by wood walks, or near the margin of water. I. sibirica, rather a common kind, will grow in the water ; and, as this is not generally known, it is worthy the notice of any one taking an interest in aquatics. It is probable that others of the beardless kinds will also do well with their roots below the water, and if so, they will one day much improve the rather poorly adorned margins of artificial waters. On the other hand, I. pumila, and the varieties of germanica, are often seen on the tops of old walls, on thatched roofs, etc., on the Continent, flowering profusely. These facts tend to show how many different positions may be adorned by the irises.
 
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