Viola diffusa subsp. apoensis
Content
Description
Leaves ¾-1½(-2) by 1-1½ cm, suborbicular to broadly ovate, deeply, rarely shallowly, cordate at base, rounded at apex, with round-crenate margins;
Distribution
Asia-Tropical: New Guinea present; Philippines (Philippines present), Luzon present, Mindanao present, Mt Apo present, Mt Data present
Malesia: Philippines (Luzon: Mt Data; Mindanao: Mt Apo), New Guinea.
Notes
It is not known whether the two subspecies occupy different habitats on Mt Data, but some hybridization is likely since these populations, although readily distinguished, are closer morphologically than other populations of the two taxa. It is possible that they have come into contact by recent introduction of one of the subspecies, in view of the weedy habitats favoured by the species.