The Cook Islands Natural Heritage Trust commissioned Wildland Consultants to undertake a survey the endemic flora of Rarotonga, and to prepare threat assessments for submission to the IUCN Red List. The focus of the survey were rare endemic species such as Cyrtandra lillianae, Sclerotheca viridiflora, Radiogrammitis cheesemanii, and Garnotia cheesemanii within cloud forest habitats, and at lower elevations Balanophora wilderi, Cyrtandra rarotongensis, and Psychotria whistleri. Additionally, whilst surveying, the extinct Acalypha wilderi and extirpated Pilea bisepala would also be searched for.