Few plant species have had as much combined scientific, public, and political attention as exotic Tamarix spp (tamarisk, saltcedar), attracting the public eye in the early 2000's when widespread drought in the West corresponded to assertions that the introduced tree used as much water as whole cities. This edited volume contains 24 essays by 44 authors on the hybrid swarm that represents invasive tamarisk, including its biology, ecology, politics, history, management, and even the philosophical and ethical issues involved with designating a particular species as