C4 plants?

[Tracy Aquilla]

In Article <p44$zRA2RJ50EwXU at upthorpe.demon.co.uk>, Oz
<Oz at upthorpe.demon.co.uk> wrote:
>In article <34E48242.61A0 at students.uiuc.edu>, Eric Grunden
><grunden at students.uiuc.edu> writes
>>
>>Pineapple is not a C3 plant (however, it's not C4 either).
>
>OK, so what is it's photosynthetic pathway, I am intrigued? I only ever
>heard of C3 & C4, and after a casual aquaintance out of interest 30
>years ago, I don't remember either any more.

CAM (crassulacean acid metabolism) is the third.
Tracy