Loganiaceae is a family of flowering plants classified in the Order Gentianales (Bendre, 1975).
The family was first suggested by Robert Brown in 1814 and validly published by von Martius in
1827 (Nicholas and Baijnath, 1994). Members habits are in form of trees, shrubs, woody climbers
and herbs. Some are epiphytes while some members are furnished with spines or tendrils (Bendre,
1975). They are distributed mainly in the tropics, subtropics and a few in temperate regions
(Backlund et al., 2000). Earlier treatments of the family have included up to 30 genera, 600 species
(Leeuwenberg and Leenhouts, 1980; Mabberley, 1997) but were later reduced to 400 species in 15
genera, with some species extending into temperate Australia and North America (Struwe et al.,
1994; Dunlop, 1996; Backlund and Bremer, 1998). Morphological studies have demonstrated that
this broadly defined Loganiaceae was a polyphyletic assemblage and numerous genera have been
removed from it to other families (sometimes to other Orders), e.g. Gentianaceae, Gelsemiaceae,
Plocospermataceae, Tetrachondraceae, Buddlejaceae, and Gesneriaceae (Backlund and Bremer,
1998; Backlund et al., 2000). The family has undergone numerous revisions that have expanded
and contracted its circumscription, ranging from one genus at its smallest (Takhtajan, 1997; Smith
et al., 1997) to 30 at its largest (Leeuwenberg and Leenhouts, 1980). One of the current
infrafamilial classifications contains four tribes: Antonieae Endl., Loganieae Endl., Spigelieae
Dum. (monotypic), and Strychneae Dum. (Struwe et al., 1994). The tribes Loganieae and
Antonieae are supported by molecular data, but Strychneae is not (Backlund et al., 2000).
Strychneae includes Strychnos Linn. and two Asian genera; Gardneria Wall and Neuburgia
Blume. Spigelia Linn., which is restricted to the western hemisphere, was included in the same
clade as Strychneae in Backlund et al. (2000). There are few molecular phylogenetic studies that
SSA, R (2021). Systematics Of Loganiaceae in West African. Afribary.com: Retrieved May 12, 2021, from https://afribary.com/works/systematics-of-loganiaceae-in-west-african
Research, SSA. "Systematics Of Loganiaceae in West African" Afribary.com. Afribary.com, 03 May. 2021, https://afribary.com/works/systematics-of-loganiaceae-in-west-african . Accessed 12 May. 2021.
Research, SSA. "Systematics Of Loganiaceae in West African". Afribary.com, Afribary.com, 03 May. 2021. Web. 12 May. 2021. < https://afribary.com/works/systematics-of-loganiaceae-in-west-african >.
Research, SSA. "Systematics Of Loganiaceae in West African" Afribary.com (2021). Accessed May 12, 2021. https://afribary.com/works/systematics-of-loganiaceae-in-west-african