| Name | Designation | Extension | Email Address |
| Prof. S.R.Weerakoon | Professor | 383 | srwee@ou.ac.lk shyamaweerakoon@gmail.com |
| Prof. H.L.D. Weerahewa | Professor | 592 | hlwee@ou.ac.lk |
| Prof. T.K. Weerasinghe | Associate Professor | 456 | ramanijayakody@yahoo.com |
| Dr. L.K.R.R. Jayakody | Senior Lecturer | 505 | ramanijayakody@yahoo.com |
| Dr. P.W.H.K.P. Daulagala (KRC) | Senior Lecturer | pwdau@ou.ac.lk pdaulagala@yahoo.com |
|
| Dr. K.A.J.M. Kuruppuarachchi | Senior Lecturer | 269 | kakur@ou.ac.lk kajmkuruppu@gmail.com |
| Dr. K.O.L.C. Karunanayake | Head / Senior Lecturer | 269 | kokar@ou.ac.lk |
| Dr. Prasad Senadheera | Senior Lecturer | 269 | spsen@ou.ac.lk |
| Dr. Roshan Perera | Senior Lecturer | 664 | kaper@ou.ac.lk roshanperera@yahoo.com |
| Ms. Y.A.S. Samithri (MRC) | Senior Lecturer | sam@ou.ac.lk s_samithri@yahoo.co.uk |
|
| Dr. L.D. Kumarage (KRC) | Senior Lecturer | ldkum@ou.ac.lk lakmini_kumarage@yahoo.com |
|
| Dr. W.H.M.T. Herath | Senior Lecturer | 269 | whher@ou.ac.lk |
| Ms. P.P.D.C. Perera | Lecturer | 269 | ppper@ou.ac.lk |
| Ms. K.I.C. Amarasinghe | Lecturer | 269 | kiama@ou.ac.lk |
| Mr. B.C. Gunaratne (MRC) | Lecturer | bcgun@ou.ac.lk bcgunaratne@gmail.com |
|
| Dr. S.M.M.P.K. Seneviratne | Lecturer (Probationary) | 269 | smsen@ou.ac.lk mihiriseneviratne1984@gmail.com |
| Dr. H.B.P. Sandani | Lecturer (Probationary) | 269 | hbsan@ou.ac.lk |
| Ms. E.H.C.M. Eeriyawala | Lecturer (Probationary) | 269 | eheer@ou.ac.lk |
| Ms. K. Mathanki | Probationary Lecturer | 269 | mkris@ou.ac.lk |
Heads Room : 634 – hdbot@ou.ac.lk
Botany Office : 452