Natural rubber at least showed promise as rubber sources, include the rubber fig ("Ficus elastica"), Panama rubber tree ("Castilla elastica"), various spurges ("Euphorbia" spp.), lettuce ("Lactuca" species), the related "Scorzonera tau-saghyz", various "Taraxacum" species, including common dandelion ("Taraxacum officinale") and Russian dandelion ("Taraxacum kok-saghyz"), and perhaps most importantly for its hypoallergenic properties, guayule ("Parthenium argentatum"). The term gum rubber is sometimes applied to the tree-obtained version of natural rubber in order to distinguish it from the synthetic version. The first use of rubber was by the indigenous cultures of Mesoamerica. The earliest archeological evidence of the use of natural latex from the
By the Tree By the Tree By the Tree is a contemporary Christian rock group. By the Tree was founded in Weatherford, Texas in 1997 by Chuck Dennie and Bala Boyd. As with most aspiring musical groups, By the Tree got their start playing a series of small venues — predominantly churches — throughout the southern and southwestern United States. Their near-constant touring cultivated a sizeable fan base. In 1999 they released two independent, self-produced CDs, which they sold at their concerts. By 2001, these two CDs had sold a combined 30,000 units, which more than recouped their production costs, and additionally brought