Nepenthes di Gunung Sibuatan, Provinsi Sumatera Utara, Indonesia Mhd. Rafi'i Ma'arif Tarigan, Yusran Efendi Ritonga BioWallacea : Jurnal Penelitian Biologi (Journal of Biological Research) Vol. 8 No. 2 2022 DOI 10.33772/biowallacea.v8i2.18815