 | | Although there are recent publications dealing with Ipomoea in the floras of several American countries (O'Donell, 1941-1960b; Austin, 1975-1991a,b; Austin and Cavalcante, 1982; Austin and al., 1986; McDonald, 1978-1995; McDonald and Austin, 1990; McDonald and Mabry, 1992; Wilkin, 1995), there is no single reference summarizing all the species currently recognized in the western hemisphere. |