The information can be found using SPUserSolution.SolutionId, but this require iterating through the SPSite.FeatureDefinitions to find a match on SolutionId.
SPUserSolution spus;
Guid id = spus.SolutionId;
foreach(SPFeatureDefinition spfd in SPContext.Current.Site.FeatureDefinitions)
{
if (!id.equal(spfd.SolutionId))
continue;
//finally have the SPFeatureDefinition object here
//now if only a way the get the Feature's Title & Description?
}