Summary

1911 Encyclopædia Britannica, Volume 22… (1911)

The ranunculus of the florist is a cultivated form of R. asiaticus, a native of the Levant, remarkable for the range of colour of the flowers (yellow to purplish black) and for the regularity with which the stamens and pistils are replaced by petals forming double flowers. R. asiaticus is one of the older florists' flowers, which has sported into numberless varieties, but was formerly held in much greater esteem than it is at the present time.
Source: Wikisource

1911 Encyclopædia Britannica, Volume 22… (1911)

The ranunculus is readily propagated from seed obtained from semi-double sorts, which are often of themselves very beautiful flowers. It is generally sown in boxes in autumn or spring. The young plants thus raised flower often in the second, and always in the third year.
The turban varieties, which are very showy for the borders, are of a few positive colours, as scarlet, yellow, brown, carmine, and white. The florists' varieties have been bred from the Persian type, which is more delicate.
Source: Wikisource

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