This section is from the book "The Wild Garden", by W. Robinson. Also available from Amazon: William Robinson: The Wild Gardener.
In spring every little shoot of the wide tufts and flakes of these plants sends up a little fountain of small golden flowers. For bare, stony, or rocky banks, poor sandy ground, and ruins, they are admirable. Alyssum Wiersbecki and A. saxatile are strong enough to take care of themselves on the margins of shrubberies, etc., where the vegetation is not very coarse, but they are more valuable for rocky or stony places, or old ruins, and thrive freely on cottage garden walls in some districts ; some of the less grown species would be welcome in such places. There are many species, natives of Germany, Russia, France, Italy, Corsica, Sicily, Hungary, and Dalmatia ; Asia, principally Siberia, the Altai Mountains, Georgia, Persia, and the entire basin of the Caspian, is rich in them.
 
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