Bumps on leaves

Hi all

anyone have any idea what these bumps are on my plants ?

they are 2 week old cuttings, look healthy though.

How about another pic that shows more of the plant?

A few of the strains I have going now do that. I think it has to do with either low humidity, or the plants SAR. (Systemic Aquired Resistance) I'm not sure, but almost every plant I've ever grown has always has some leaves, if not all of them do this.

If the plants are happy otherwise, don't sweat it. If the leaves start dying off, now that's something I'd be concerned with.

BTW, welcome to RIU.

I noticed the same thing on my otherwise healthy plants.