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"The abdomen and cephalothorax of spiders are closely attached, while in ants the equivalent of these body parts are separated by a narrow segment called the petiole," Poinar said.

However, it is impractical to deploy spectral instruments over a petiole due to their thin shape.

In the 1800s botanists proposed that the sheath part of a grass leaf represented the evolutionary equivalent of the petiole, the stalk that connects a typical plant’s leaf to its stem.

Botanists have discovered that money is not only the root of all evil, but also its hypocotyl, petiole and axillary bud.

His multiplication how-to: Take a leaf cutting, leaving as much petiole, or stalk, as possible.