C. keei 'West Kalimantan'

The distribution map on the crypt pages showed that C. keei could be found in west Kalimantan and it was right. C. keei could be found in some of the rivers there with sandy base and pH of about 6 to 6.5.

The funny thing was that we found quite a few spathes without female flowers, the below photographs showed 2 of them. Is this a common phenomena for C. keei?