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

PETER B HEENAN; SHANNEL P COURTNEY

doi:10.11646/phytotaxa.314.1.7

Issue: Vol. 314 No. 1: 21 July 2017

Type: Article

Published: 2017-07-21

DOI: 10.11646/phytotaxa.314.1.7

Page range: 89–95

Abstract views: 19

PDF downloaded: 1

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

PETER B HEENAN⁺⁻
SHANNEL P COURTNEY⁺⁻

Research Associate, Allan Herbarium, Landcare Research, PO Box 40, Lincoln, New Zealand 7640 Present Address: Wildland Consultants, PO Box 33499, Barrington, Christchurch, New Zealand 8244

Department of COnservationDepartment of Conservation, Private Bag 5, Nelson, New Zealand

Geranium Geranium rubricum threatened species New Zealand flora ultramafic geology Eudicots

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Abstract

A new species, Geranium rubricum, is described from the Red Hills, northern South Island, New Zealand. Geranium rubricum is distinguished by its rhizomatous and compact growth habit, small and coriaceous leaves up to 10 mm in diameter, large sepals with uniformly sized appressed hairs, and large flowers up to 25 mm in diameter. G. rubricum is restricted to soils associated with ultramafic rock outcrops and scree slopes. It is known from seven small subpopulations in the Red Hills, and the conservation status is assessed using the New Zealand Threat Classification System as Nationally Endangered.