Morphological variation, species delimits, and phylogenetic relationships of four important Ipomoea species in Sri Lanka
P.G.R.G.
Rathnayake,
R.
Salih,
W.W.M.U.K.
Wijesundara,
W.G.A.S.
Sumanarathne,
L.T.
Ranaweera,
H.S.M.
Jayarathne,
C.K.
Weebadde,
S.D.S.S.
Sooriyapathirana