Heenan, P.B. and Courtney, S.P. 2017.

Geranium rubricum (Geraniaceae), a new species from ultramafic soils in the Red Hills, northern South Island, New Zealand

. Phytotaxa. 314, 1 (Jul. 2017), 89–95. DOI:https://doi.org/10.11646/phytotaxa.314.1.7.