Blueing in cedar

[SoftWood]

Has anyone ever dealt with this blue streaking in red cedar before?  
I've been using cedar from one area on the coast for years and never run into it, but recently bought some lumber from the interior and some of it has these streaks of blue.  They are always along the grain, some in faint ribbons, some in fatter blotches.  It must be the beginning stages of rot because some of the streaks have rot in the centre.  I have seen rot in the lumber before but never this blue.

[Don P]

Bluestain fungi, same as in pine or many other woods, it is not a rotter, it is after the sugar in the sapwood but the conditions were right for rot, decay fungi. Sticker and dry faster is the usual cure, but you weren't there at that stage.

[btulloh]

Looks like cambium and inner layer of bark. Irregular nature of older cedar trees makes it easy to run into inclusions in the outermost boards. Nature of the beast, especially in trees that grow in the open. Woods grown ERC tends to be a bit more uniform, but older trees still develop an undulating surface.  (Or as Doc Henderson has termed it: "lobulations".  lol )