Kafri believes that the trees she saw in the Gilat nursery were 6–7 years old. “They were adult trees rising to a height of over 2 meters,” she says.

None of the seven acacia trees in the front yard of Sam Morse's home in La Feria, Texas, seem different from any of the others—or from their countless cousins that thrive in the Lower Rio ...

Each tree carries up to 47,000 seeds, which curl from orange strings in earlike pods, and disperse through canals, creeks, rivers and aggressively encroach on sensitive ecosystems, Minteer said.