Parsonsia praeruptis (Apocynaceae): A new threatened, ultramafic endemic from North Cape, New Zealand

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Abstract
Parsonsia praeruptis is described from the Surville Cliffs, North Cape. It differs from the widespread New Zealand species P. capsularis by its non‐twining, non‐climbing habit, shorter, ovate leaves with a subcordate base, smaller inflorescences, and glabrous calyx lobes. P. praeruptis is an ultramafic endemic and has a total range of less than 120 ha. Its conservation status is assessed as “Rare” because of threats from browsing animals and weeds. A key to New Zealand species of Parsonsia is provided.