x1 is a plant symbolizing the idea of love, to x2.
Western literature is full of works that use roses as romantic symbols, and many other cultures use other flowers for more or less the same purpose. Similarly, the x1 of .almapamla symbolically represents the idea of love itself. For native English-speaking Lojbanists, a rose will likely be a common example of an x1, but it could be any plant. x2 can be either the author or audience of any spoken or written text which uses x1 to represent love. See also spati, rozgu, prami, sinxa. Unrelated to the similar-sounding alma and palma.