In Tsou language, fona refers to the hyacinth bean, which comes from a perennial plant that grows well on barren soil and adverse conditions.

BBC: Tribal culture survives in Taiwan

Fall, in fact, is a perfect time to plant trees, shrubs and perennial flowers that may benefit birds.

WSJ: Giving Birds a Refuge--WSJ Weekend Gardener

Farmers plant a warm-season perennial grass and fallow the field for two years, improving soil quality and water-holding capacity.

FORBES: New Technology Reduces Agricultural Water Consumption

If we grow biofuels in ways that require very low input of fossil energy to grow them, which we can do, let's say, if we grow things like perennial plants where we don't need to plant them every year.

NPR: Biofuels and Food Prices