I'm sure there's a correct name for it, I call it marbling, but that might not be an adequate description. I see it in some strains, not in others. It's especially prevalent in much of the newer hybrids I've seen of late, but I don't know that it's from Chemdog specifically, that's just some of the earliest examples I can think of, that have that have that trait, to a very obvious degree.
It's the way the bud forms around or in between the smaller leafs. All of these types of different characteristics seem to affect the number and length of trichomes, (or at least potential) the patterns, the numbers or density in structure in which they proliferate. I really enjoy seeing different trichome structure, and noting differences in plant development.
I can't wait for this camera I've got coming, so I can see them so much closer. I think there are things to be learned, possibly. It appears many of the larger glandular trichomes have been bred to grow in areas/structures of the plant that once lacked, or had smaller ones in the past. There are a lot of "different" looking types of trichomes in various places.
Some obviously, produce more oils than others. I think "long" trichomes w/large bulbulus heads, have the most potential, personally.