PRODUCTION OF DOUBLE CONE 

 FLOWERS 



David Griffiths 

 U. S. Department of .Ic/ricitltitrc. 



SINGLE AND DOUBLE CONE FLOWERS 



Figure 9. Several stages of doubling are shown, from flowers with only a single row 

 of ray-flowers around the base of the "cone" to those with ray-flowers nearly to its apex. 

 It has been found impossible to reproduce the double flowered plants satisfactorily from 

 seed, but greater success was attained- with cuttings, the method used being described 

 in the text. 



IT HAS been fully ten years since 

 the author found a completely dou- 

 ble flowered form of Ratibida col- 

 iminifera near Artesia Wells. Texas. 

 This species as it grows in Texas is 

 often a very different thing from what 

 passes under the same name in the 

 Northern Plains region. There it is 

 usually low and spreading, but in 

 Texas it may often be found 2^ to 

 33X feet high, and when growing" thick- 

 ly, quite erect in hal)it. 



The planting from which the stock 

 in question was obtained was a very 

 thick one, covering possibly one-twen- 

 tieth of an acre, and most of the 

 plants were fully three feet high. In 

 it were all graduations of ray-colora- 

 tion from piu'e yellow to deep maroon, 

 the latter predominating. The double 

 flowered forms seen by me were all 

 of the maroon type and varied con- 

 siderably in the amount of doubling, 

 some plants showing it only a little. 



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