We investigated the spherulite formation in an isotactic polypropylene (iPP)/partially hydrogenated oligo(styrene-co-indene) blend by time-resolved light scattering equipped with a CCD camera system and transmission electron microscopy(TEM). The V-v (parallel polarization) light scattering pattern at a high crystallization temperature (T-c = 105 degrees C) changed from a single-ring pattern to a double-ring one and then to a circular symmetric one. Based on model calculation, the formation of the ring pattern can be interpreted by the positive birefringence spherulite which is expected to appear when the crosshatched lamellae sufficiently develop. The H-v (cross-polarization) light scattering pattern was the rod type, implying that a high level of orientation ordering was established in radial direction but a low level in tangential one. It is consistent with the above argument on the V-v patterns since the less ordering in tangential orientation could be caused by the crosshatching. Similar analysis on the crystallization at a low temperature (T-c = 85 degrees C) showed a formation of noncrosshatched and fragmented lamellae. The analysis was supported by the TEM observation. Thus, we found that the new morphologies are available by adding miscible impurity and controlling the T-c.