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CULT: HIST: What is PBF?

In a message dated 5/12/2007 4:41:02 PM Eastern Daylight Time,  
inanda1@mts.net writes:

Mine is  growing well .  Can somebody tell me if it is a PBF.  New  for  me 
year.  Thought it was PBF but mine  isn't!!!!

It occurs to me that it is possible that some folks here may be new to  this 
terminology. What we are taling about is "Purple Based Foliage." 
PBF, so called, is foliage of bearded--and in some cases  beardless--irises 
which is naturally stained violet to some degree at some time  in the growing 
cycle. The effect may be strong or faint, it may be fugitive, it  may infuse 
the foliage and stalk to a remarkable degree, or  merely veil the increase at 
the base of the rhizome. 
People in HIPS, the Historic Iris Preservation Society, who are interested  
in the identification of Unknows, which are older cultivars which have  become 
separated from their true names, are very interested in PBF as a  
discriminator. Because PBF does not always show in all conditions, the  presence of the 
coloration should be seen as more significant for identification  purposes than 
its apparent absence. Any degree of violet  manifesting at any time in the 
growth cycle, counts as  PBF.  
Phil Edinger, of HIPS, who has made a special study of the identification  of 
Unknowns is, so far as I am aware, the originator of the concept of PBF as  
such. He was not, of course, the first to note the staining on the bases of  
some cultivars. 
Anner Whitehead
Richmond VA USA  
Jamestown Expedition and Settlement Quadricentennial May, 1607- May,  2007
"At one time...it was all Virginia."


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