Orchid mycorrhiza allowed for the identification of specific taxa forming symbiotic relationships which are of interest in the study, cultivation, and conservation of orchids. This is especially important in the trade and preservation endangered species or orchids of commercial value like the vanilla bean. There have been seen trends in the type of symbioses found in orchids, depending primarily on the life-style of the orchid, as the symbiosis is primarily of benefit to the plant. Terrestrial orchids have been found to commonly associate with Tulasnellaceae, however some autotrophic and non-autotrophic orchids do associate with several ectomycorrhizal fungi. Epiphytic fungi, however, may associate
History of Mexican Americans March 25, 2006 in Los Angeles. As of today, this self-proclaimed "largest march in U.S. history" which was primarily organized by Mexican American organizations, Chicano activists, and fueled through a large network of active Internet users, L.A. Spanish language television, and Spanish language news radio coverage, is still virtually ignored by American mainstream (English language) news media and all textbooks of the American educational system. A common pattern emerged after 1940 of men working summers in the U.S. and spending the winter season in the village back in Mexico. While this became illegal in 1965, the numbers involved kept growing.