Notes

Some specimens with a sparser indumentum on the leaf lower surface do occur, and one from Zambia (Silungwe s.n.) has densely tomentose inflorescence axes and calyx tube. Bullock cited Canthium platyphyllum in synonymy for this species, noting \"C. platyphyllum is a further form with a lanate tomentum on the inflorescence and young branchlets; this falls away and the plant develops a rusty-red coloured bark.\" It is in fact a synonym of Vangueriopsis lancifolia. Sterile material of both V. lancifolia and Ancylanthos rubiginosus can resemble M. crassa var. ampla but usually have a stronger indumentum, and rusty-red bark.