Taiwania 66(3): 273‒276, 2021 DOI: 10.6165/tai.2021.66.273 273 Tuberolabium camperenik (Orchidaceae), a new Aeridinae species with crystal white flowers from West Java, Indonesia Mark Arcebal K. NAIVE 1,2,* , Yuda Rehata YUDISTIRA 3 , ROMIYADI 4 , Dadang SUMARDI 5 , Paul ORMEROD 6 1. Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan 666303, China. 2. University of Chinese Academy of Sciences, Beijing 100049, China. 3. Ambit village No. 23, RT/RW 003/003, Situraja District, Sumedang Regency, West Java, 45371, Indonesia. 4. Agrotechnology, Winaya Mukti University, Jl. Bandung-Sumedang Km. 29 West Java, 45362, Indonesia. 5. School of Life Sciences and Technology, Intitut Teknologi Bandung, Gedung Labtek XI Jl. Ganesa 10 Bandung, Jawa Barat - Indonesia. 6. P.O. Box 8210, Cairns, Qld., 4870, Australia. * Corresponding author’s E-mail: arciinaive19@gmail.com (Manuscript received 14 April 2021; Accepted 31 May 2021; Online published 11 June 2021) ABSTRACT: A new Javan endemic Tuberolabium species, Tuberolabium camperenik Yudistira, Naive & Romiyadi, is herein described and illustrated. It is unique among the three Tuberolabium species found in Indonesia by having crystal white flowers and a long, very narrow spur not thickened on the front wall around the epichile. Detailed description, colour plates, phenology, distribution and a preliminary conservation assessment are provided in this paper. KEY WORDS: Epidendroideae, Malesian Flora, Orchid, Tropical botany, T. odoratissimum, Vandeae. INTRODUCTION Established by Yoshimatsu Yamamoto in 1924, the genus Tuberolabium Yamam. belonging to the subtribe Aeridinae, is represented by eight accepted species that are distributed in Taiwan, Thailand, Sumatra, Java, Lombok, Sulawesi, Maluku, and the Philippines (Kocyan and Schuiteman, 2014; Ormerod and Juswara, 2019; POWO, 2020). The genus comprises of monopodial epiphytes that produce pendent, many- and small- flowered inflorescences (Ormerod and Juswara, 2019). Tuberolabium has been morphologically confused in particular with its closely related genus Trachoma; however, recent molecular phylogenetic analysis showed that they are indeed distinct from one another. Tuberolabium was found sister to Ceratocentron and both are closely related to Amesiella, Biermannia, Cryptopylos, Dyakia, Hymenorchis, Macropodanthus, Saccolabium and Trachoma (Pridgeon et al., 2014; Zou et al., 2015). In October 2019, an unidentified epiphytic orchid was collected in the Mt. Masigit area, West Java, Indonesia and has subsequently been cultivated by the second author. Flowering specimens of the species were examined by the authors in March 2020 at Biology Laboratory of the Faculty of Agriculture, University of Winaya Mukti, West Java, Indonesia. After detailed morphological examination and thorough review of protologues and digitized type specimens, results revealed that this taxon belongs to Tuberolabium, however, it doesn’t match to any existing member of the genus. Hence, we describe it here as Tuberolabium camperenik, a species new to science. This new addition brings the total number for this genus to nine. MATERIALS AND METHODS The measurements and descriptions were based on fresh collected materials, unless otherwise indicated. The general plant descriptive terminology follows Beentje (2016). Herbarium citations follow Index Herbariorum (Thiers, 2020). Original material of Tuberolabium spp. from Indonesia and neighbouring countries were examined in different herbaria through high-resolution images from Global Plants on JSTOR accessed at https://plants.jstor.org/ and Plants of the World Online accessed at http://www.plantsoftheworldonline.org/. An assessment of conservation status was carried out following IUCN (2019), based on our current knowledge and using their terminology on categories, criteria and subcriteria. TAXONOMIC TREATMENT Tuberolabium camperenik Yudistira, Naive & Romiyadi, sp. nov. Figs. 1–2 Type: INDONESIA. West Java, Bandung Regency, Mount Masigit, elev. 1000–1500 m, 30 th March 2020, Romi 001-002 (holotype BO; isotype BO - spirit collection). Diagnosis: Tuberolabium camperenik differs from the three Indonesian Tuberolabium species (T. odoratissimum, T. erosulum and T. pendulum) in having crystal white flowers and a long, very narrow spur which