I've just completed a crash course on the scourge of invasive trees in Texas.
Like most mortals, I always thought, "it's a leafy green tree converting carbon dioxide into oxygen, why would it be bad?"
Turns out there are a million reasons.
In addition to choking out native species, invasives alter the microbiology of soil. They outcompete native species and alter natural habitats.
Garden centers and supermarkets continue to sell attractive and low-maintenance plants that are classified as invasives, including Japanese honeysuckle, knotweed, kudzu, privet, and wisteria.
The online database Texas Invasives maintains a "take no prisoners" attitude, advocating for the removal of all invasive trees and plants without compromise.
According to Barry Ward, director of nonprofit Trees for Houston, the invasive vegetation is impossible to eradicate entirely.
"To eliminate the problem, you would have to go back in time to the pre-Columbian exchange of 1492," he told me during a phone interview. "It is unfortunately a problem that's here to stay. The next best thing is to not introduce any new invasives."
Here are the worst invasive trees in Houston.
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