Taxonomic revision of the southern hemisphere pygmy forget-me-not group (Myosotis; Boraginaceae) based on morphological, population genetic and climate-edaphic niche modelling data

A taxonomic revision of the southern hemisphere pygmy forget-me-not group (Myosotis L.; Boraginaceae) is presented here. Climate-edaphic niches are modelled and compared for five species in group, namely, M. antarctica Hook.f., brevis de Lange & Barkla, drucei (L.B.Moore) pygmaea Colenso glauca (G.Simpson J.S.Thomson) one unnamed putative taxon, “Volcanic Plateau”. In this case, niche-modelling data mostly do not aid delimitation, but morphological genetic provide evidence recognising following three within group: (both endemic to New Zealand), an enlarged (native Zealand, Campbell Island Chile). Myosotis here circumscribed include sens. strict., pygmaea. The two allopatric subspecies recognised on basis minor differences: subsp. (formerly from Chile, Plateau”) traillii Kirk known by Zealand botanists as Colenso, illegitimate name). For all species, which considered Threatened or At Risk, most their variation partitioned between rather than populations, meaning that conserving many populations possible should be priority minimise risk extinction.