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Weed control, management, ecology, and minutia
by Steve M Sanguinetti
on December 15, 2017 at 8:09 AM
This really doesn't help much, but below is from Wikipedia  
In biological classification, family (Latin: familia, plural familiae) is one of the eight major taxonomic ranks; it is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks above the rank of genus. In vernacular usage, a family may be named after one of its common members; for example, walnuts and hickory trees belong to the family Juglandaceae, commonly known as the walnut family.  
What does or does not belong to a family—or whether a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, or any taxa. Taxonomists often take different positions about descriptions of taxa, and there may be no broad consensus across the scientific community for some time. Some described taxa are accepted broadly and quickly, but others only rarely, if at all; the publishing of new data and opinion often enables adjustments and consensus over time.
by Mark Sytsma
on December 15, 2017 at 9:19 AM
We recently found pickerel weed in Oregon near Salem. It is not native here. A specimen from a stand was collected in 1998 near Gold Beach (Oregon south coast) and deposited in the OSU herbarium. I checked it out this summer and it doesn't seem to have spread in 20 years, so it doesn't appear to be too invasive in Oregon, at least so far.
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