Gl. Maggs et al., TAXONOMY OF THE GENUS PELARGONIUM (GERANIACEAE) - THE SECTION POLYACTIUM .2. THE SUBSECTION CAULESCENTIA, South African journal of botany, 61(4), 1995, pp. 173-179
The monospecific subsection Caulescentia of Pelargonium section Polyac
tium is treated taxonomically. Its systematic position is discussed in
terms of its macromorphology, pollen grain sculpturing, anatomy of th
e petiole, chromosome number, and breeding behaviour.