1.) Yes, you could assume that. As these parasites are often obligate on living plant material, they would kill themselves, if they will kill their host (but sometimes this happens, too).
2.) Yes, it should be systemic as mycelium in the…
the fungus you present is not a rust, but it is a smut fungus, my special working area The species is Tranzscheliella sparti, which is restricted to the floral parts of Lygeum. Other Tranzscheliella species, which could also infect the host…