Finding chart of our observations. The positions of previous CO observations (Wiklind et al. 1995; Braine et al. 1997) are marked with light green circles. HI line contours (dark green) and X-ray contours (brown) are plotted over the narrow band  Hα +  [N ii] image of Virgo’s core (adapted from Kenney et al. 2008). The velocities appearing in gray correspond to those of the  Hα gas as measured by the same authors. In red, we mark the  Hα clouds that we observed searching for associated CO emission. Upon detection, we also indicate the velocity of the molecular gas traced by the ¹²CO(1−0) line. In addition to these 20 regions, we also observed at 12:27:30.0+13:12:12.0, northwest of NGC 4435, in the clouds that Cortese et al. (2010a) denote as plume.