Diversity and conservation of Indonesian Hoya (Apocynaceae) in the Bogor Botanic Gardens

Abstract

Rahayu S. 2018. Diversity and conservation of Indonesian Hoya(Apocynaceae)in the Bogor Botanic Gardens. Pros Sem Nas Masy Biodiv Indon 4: 291-295.The genus Hoya(Asclepiadaceae) has become popular as exotic ornamental plant in Europe, USA, and Australia, while in Indonesia as the home country of many Hoyaspecies is still neglected. Several species are rare due to habitat loss. Since 1995, an ex-situ conservation strategy has been conducted in Bogor Botanic Garden. Three main activities have been done. They are (i) Inventory of Indonesian Hoyaspecies, (ii) Living collection management, (iii) Sustainable Utilization. Approximately 100 Hoyaspecies occur in Indonesia, concluded from literature and Herbarium studies. Unfortunately, revision of this genus doesn’t do well and is still incomplete. 66 species have been collected in Bogor Botanic Garden as a result from Flora Explorations during the 23 years (1995-2018), three species published as new species, and 11 morenew species will be published soon, and a new variety relusted from mutation breeding registered and hold a Plant Variety Protection (PVP) right. During their adaptation in The Bogor Botanic Garden, some species were unsuccess. The propagation techniques still need developing, as the different species may need different treatment. Promotion as an ornamental plant is the first utilization on Indonesian Hoyaspecies is recommended.