Mauro Morales picks his way through mesquite trees and prickly pear cacti. The 65-year-old cautiously steps around a thicket of tasajillo, or rattail cactus, just down the road from his small ranch near Rio Grande City. Tasajillo thorns stick you like a fish hook, he says. Then there’s the cola seca—the rattlesnake—another job hazard.
“We’re far enough from a hospital that you probably wouldn’t make it if you got bit,” he says in a quiet voice, as though a snake might take his words as an invitation to strike.
Morales has been wandering through the chaparral for half an hour, staring at the ground. He combs over small rocks with a stick. Finally, he spots a greenish knob, sprouting out of the ground under the tasajillo thicket.
“There’s some medicine, right there,” he says. It’s a lone peyote button, about an inch in diameter, way too small to harvest. It’ll be another five years before this peyote is mature. As he navigates the hostile flora, he points to three more small peyote plants, all of them too young to cut.
“I used to collect as much in a week as I now do in a month,” he says. “I don’t know what’s going to happen to the medicine.”
Recently Stuefer and his colleagues were the first to demonstrate that clover plants warn each other via the network links if enemies are nearby. If one of the plants is attacked by caterpillars, the other members of the network are warned via an internal signal. Once warned, the intact plants strengthen their chemical and mechanical resistance so that they are less attractive for advancing caterpillars.
Smithsonian researchers are among the leaders in a worldwide effort to revolutionize the way scientists identify species in the laboratory and in the field with a technique called DNA barcoding. Similar to the barcode that identifies an item at the grocery store, a DNA barcode is used to identify and distinguish biological species.
Scientists may have discovered the cause of a devastating syndrome in honeybees that has destroyed 50% to 90% of hives in the USA — posing enormous problems for crops that depend on them to reproduce.
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