Help ID wildflower from Peru please

Would you help me with identification of the following wild flowers, please. The pictures were taken at the elevation of approx. 4000 meters in Cordillera Blanca

 

2. Tagetes sp., possibly T. minuta.
http://www.hort.purdue.edu/newcrop/proceedings1993/v2-649.html

 

this is great help, thank you

 

#3 suggests Gentianaceae to me -- perhaps send the photo to the Gentian Research Network?

(why I think Gentianaceae: flower-bearing stems emerging from axils of opposite leaves, bottle-like structure of flowers when in bud, "inky" colouration of stems subtending the flowers)

 

thank you for the help