 Reflecting their close relationships with trees , the fruit bodies of L. indigo are typically found growing on the ground , scattered or in groups , in both deciduous and coniferous forests . They are also commonly found in floodplain areas that have been recently submerged . In Mexico , associations have been noted with Mexican alder , American <unk> , American <unk> , and <unk> <unk> , while in Guatemala the mushroom associates with smooth @-@ bark Mexican pine and other pine and oak species . In Costa Rica , the species forms associations with several native oaks of the Quercus genus . Under controlled laboratory conditions , L. indigo was shown to be able to form ectomycorrhizal associations with the <unk> pine species Mexican white pine , <unk> 's pine , Mexican yellow pine , smooth @-@ bark Mexican pine , and the Eurasian pines Aleppo pine , European black pine , maritime pine , and Scots pine . 
