Wow. I’ve got dozens of great big castorbean plants in the forest here. They’re all “volunteers” and this is the first year they’ve been here.
Maybe castor beans should be converted into fuel! From a search:”The seed of candlenut (Aleurites molucanna) contains about 50 percent oil and burns like a candle. The ancient Polynesians brought this tree to the Hawaiian Islands where it has become naturalized. The dried nuts were cracked open and the seeds were skewered onto the midrib of a coconut frond (or slender bamboo stem) and set on fire. [Since they contain about 50 percent unsaturated oil, the seeds ignite readily.] The Polynesians used them for candles that burned for about 45 minutes. Hawaiians also extracted the oil for many other uses: to shine and waterproof wooden bowls, to mix with charcoal to make black canoe paint, to burn as torches, and to burn in stone lamps for light.”