Species of Liverworts Family Plagiochilaceae of Mount Lubuk Raya North Sumatera Indonesia

The species diversity of Plagiochilaceae in Sumatera, especially North Sumatera has not been widely reported. This study aims to know the spesies richness of Plagiochilaceae at Mount Lubuk Raya, North Sumatera. The study was conducted from July until December 2017. Sample was collected along the hiking trails in the study site using the explorative survey method. Eighteen species of Plagiochilaceae have been encountered belonging to two genera: Pedinophyllum, and Plagiochila. Among the species, Plagiochila nobilis is a new record to the liverworts flora of Sumatera. The species of Plagochilaceae were found as epiphyte on the tree trunk, on the decaying wood and twigs. The common species found in the study sites was Plagiochila arbuscula, while the uncommon species were Pedinophyllum interuptum, Plagiochila obtusa, Plagiochila schiopila and Plagiochila teysmannii.