[1] Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92501 USA
[2] Univ Nacl Autonoma Mexico, Seminario Lenguas Indigenas, Inst Investigaciones Filologicas, Mexico City 04510, DF, Mexico
[3] Univ Autonoma Metropolitana Unidad Xochimilco, Dept Relaciones Soci, Mexico City 04960, DF, Mexico
[4] Herbario Centro Investigaciones Biologicas Noro, Mexico City, DF, Mexico
[5] Univ Calif San Diego, Scripps Inst Oceanog, Div Marine Biol Res, La Jolla, CA 92093 USA