Why is floating IP listed as private in nova list?

I'm using nova-network, FlatDHCP. Connectivity is all fine.

I've created a floating ip pool range (172.18.3.25/27). However when I do a "nova list", I get:

+--------------------------------------+------+--------+----------------------------------+
| ID | Name | Status | Networks |
+--------------------------------------+------+--------+----------------------------------+
| 19a82460-1a15-473f-ae5a-87cdf16e0f67 | sdf | ACTIVE | private=192.168.32.2, 172.18.3.2 |

Note that the private Networks field lists both fixed and floating as private. I was expecting to see:

private=192.168.32.2, public=172.18.3.2

Any thoughts on how to make this happen. The 172 address is publicly available, but not listed as such.