" The three species of pine native to Wisconsin (white, red and jack) differ radically in their opinions about marriageable age. The precocious jackpine sometimes bloom and bears cones a year or two after leaving the nursery, and a few of my 13-year-old jacks already boast of grandchildren. My 13-year-old reds first bloomed this year, but my whites have not yet bloomed; they adhere closely to the Anglo-Saxon doctrine of free, white, and twenty-one. "

― Aldo Leopold , A Sand County Almanac and Sketches Here and There