Aldo Leopold said this quote

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.