They are all each slightly different and there are hybrids among the species. Do you think yours might be a hirta of some sort, just different from the ones I posted pics of or do you think it might not be a J. hirta? I am planning on getting you some more photos of some others.
From what I can make out in your picture, the chicks/rollers, however, look very similar to the hirta roller chicks. The pictures I posted were past the roller stage.