 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 milky " ( L. paradoxus ) , 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. chelidonium has a yellowish to dingy yellow @-@ brown to bluish @-@ gray cap and yellowish to brown latex . L. quieticolor has blue @-@ colored flesh in the cap and orange to red @-@ orange flesh in the base of the stem . Although the blue discoloration of L. indigo is thought to be rare in the genus Lactarius , in 2007 five new species were reported from Peninsular Malaysia with bluing latex or flesh , including L. cyanescens , L. lazulinus , L. mirabilis , and two species still unnamed . 
 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 milky " ( L. paradoxus ) , found in eastern North America , which <a href='got' title='1'><mark>has</mark></a> a grayish @-@ blue cap when young , but it <a href='uninflect' title='2'><mark>has</mark></a> reddish @-@ brown to purple @-@ brown latex and gills . L. chelidonium <a href='got' title='3'><mark>has</mark></a> a yellowish to dingy yellow @-@ brown to bluish @-@ gray cap and yellowish to brown latex . L. quieticolor <a href='got' title='4'><mark>has</mark></a> blue @-@ colored flesh in the cap and orange to red @-@ orange flesh in the base of the stem . Although the blue discoloration of L. indigo is thought to be rare in the genus Lactarius , in 2007 five new species <a href='uninflect' title='5'><mark>were</mark></a> reported from Peninsular Malaysia with bluing latex or flesh , including L. cyanescens , L. lazulinus , L. mirabilis , and two species still unnamed . 
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 milky " ( L. paradoxus ) , found in eastern North America , which got a grayish @-@ blue cap when young , but it have reddish @-@ brown to purple @-@ brown latex and gills . L. chelidonium got a yellowish to dingy yellow @-@ brown to bluish @-@ gray cap and yellowish to brown latex . L. quieticolor got blue @-@ colored flesh in the cap and orange to red @-@ orange flesh in da base of tdastem . Although thdalue discoloration of L. indigo is thought to b rare in the genus Lactarius , in 2007 five new species was reported from Peninsular Malaysia with bluing latex or flesh , including L. cyanescens , L. lazulinus , L. mirabilis , and two species still unnamed .