Amnesia

So there's a few things going on here. First, im not entirely sure if this is amnesia. I started 3 grows at the same time and have forgotten to label them when i've repotted them. This is the most sativa out of the batch of 3 (others are girl scout cookies and monster skittlez) and its supposed to flower for 12 weeks or something like that. However, this is week 7 of flower (or possibly 8, still finding it difficult to pinpoint that) and looking at the trichromes i have a feeling that she is ready for harvest. I'm hoping you guys can help me out here - so theres two questions id like to ask: - does this look like an amnesia fotoperiod plant? and, - according to the trichrome shots : is she about ready for harvest? thanks!