| Title | The Cattleyas and their Relatives: the Debatable Epidendrums. Portland, USA; Cambridge, U.K. |
| Abbreviation | Cattleyas & Relatives: Debatable Epidendrums |
| Authors | C. L. Withner: P. A. Harding |
| Publication Dates | 2004 |
| ISBN | 0881926213 |
| Remarks | Supplement to the Cattleyas and their relatives, vols. 1-6, published 1988-2000. |