Full Idea
Concepts do not require consciousness. As Jaynes says, the bee has a concept of a flower, but not a conscious concept.
Gist of Idea
Maybe there can be non-conscious concepts (e.g. in bees)
Source
Daniel C. Dennett (Brainchildren [1998], Ch.6)
Book Reference
Dennett,Daniel C.: 'Brainchildren' [Penguin 1998], p.128
A Reaction
Does the flower have a concept of rain? Rain plays a big functional role in its existence. It depends, alas, on what we mean by a 'concept'.