RE: Flowering time : latitudinal relationships?

Chris brings up an interesting twist on this,

<snip>
So, using the "indicator species" concept from the other post, I wonder if 
I can find a correlation.  For example, Aesculus glabra is found blooming 
in Chicago from 29 Apr - 18 May.
Apparently it blooms at the Missouri Botanical Garden from 10 Apr - 23 Apr. 
 Can I apply this against other plants that bloom at the same time as A. 
glabra?
Seems to work for Vaccinium corymbosum and Aquilegia canadensis...
But it's odd; Lindera benzoin is reported as blooming at the same time in 
both places
<snip>

This idea works best with CLONAL material that has a specific set of 
genetic responses to particular environmental cues.  Native species with 
their inherent genetic variability would likely cause the phenomenon Chris 
notes with Lindera.
Of course one could use clones of natives just as effectively I would 
think.

Scott Vergara
R&D for a commercial nursery
Forest Grove, OR (west of Portland)
USDA Zone 7b


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