Sentence:  For a long time I believed the common yarrow to be introduced, as the country had been settled at least ten years before I saw it, but my belief in that is shaken, as I never sent for flowers by friends, when they went to an unknown region, but they inevitably brought yarrow. I have had it sent from Texas, Utah, Pike's Peak and Long's Peak, Colorado, and at last from the Alps and Germany; so its <WSD>nativity</WSD> is very uncertain. 
Meaning of the word marked with <WSD> tags:  Place of origin; place to which a species is native.