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
What the....You Mean I Can't Sing?! describes his vocal style as "the old Southern style", which was influenced by singers he had heard growing up in South Chicago. Van Peebles also said that he was influenced by older forms of African-American music: "[...] people like Blind Lemon Jefferson and the field hollers. I was also influenced by spoken word song styles from Germany that I encountered when I lived in France." The music on "What the...You Mean I Can't Sing?!" largely derives from funk and soul music. Van Peebles' lyrics encompass themes ranging from lighter and humorous to more socially conscious themes, although it is less