 The characteristic blue color of the fruiting body and the latex make this species easily recognizable . Other Lactarius species with some blue color include the " silver @-@ blue <unk> " ( L. <unk> ) , found in eastern North America , which has a grayish @-@ blue cap when young , but it has reddish @-@ brown to purple @-@ brown latex and gills . L. <unk> has a yellowish to <unk> yellow @-@ brown to bluish @-@ gray cap and yellowish to brown latex . L. <unk> has blue @-@ colored flesh in the cap and orange to red @-@ orange flesh in the base of the stem . Although the blue <unk> of L. indigo is thought to be rare in the genus Lactarius , in 2007 five new species were reported from <unk> Malaysia with <unk> latex or flesh , including L. <unk> , L. <unk> , L. <unk> , and two species still unnamed . 
