Today’s Solutions: June 09, 2023

There are many benefits to living on a sheer cliff face, if you’re a very rare Hawaiian plant. Hungry goats can’t get to you. Neither can oblivious people, who are known to crush priceless plants underfoot. Nor can botanists, even though they just want to save the plants. That’s how Hibiscadelphus woodii, a relative of the hibiscus flower, wound up on the extinct species list in just shy of two decades after it was first discovered by botanist Ken Wood in 1991, in the Kalalau Valley on the Hawaiian island of Kauai. The last known sighting of H. woodii was in 2009. Efforts to grow new H. woodii plants in greenhouses failed over and over; neither grafting, tip cuttings, nor attempts at cross pollination could resurrect it. The hundreds of thousands of years-worth of evolution that created its unique features—such as its tube-shaped bell, which turns from yellow to maroon as it ages, and is formed to perfectly fit the beak of its pollinator, a native species of honeycreeper bird—seemed lost forever. But on a sunny day in February 2019, a drone specialist suddenly spotted the supposedly extinct flower hiding on a steep, green cliffside, prompting celebrations amongst botanists throughout the island. If you’re curious to see footage of the drone finding this special Hawaiian flower, look no further.

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