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Total Plants: 27

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Plant	Part	Low PPM	High PPM	StdDev	^*Reference
Prunus serotina	Leaf	0.8	19.0	0.1	*
Quercus velutina	Stem	0.7	14.9	-0.5	*
Quercus alba	Stem	2.6	23.6	1.6	*
Quercus rubra	Stem	0.6	19.8	0.7	*
Quercus rubra	Seed	--	0.04	0.3	*
Rhus copallina	Stem	0.7	9.2	-1.8	*
Rhus copallina	Leaf	0.8	29.0	1.7	*

^*Unless otherwise noted all references are to Duke, James A. 1992. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton, FL. CRC Press.