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Penelitian ini bertujuan untuk melakukan penapisan senyawa alkaloid pada beberapa jenis tumbuhan paku yang ditemukan di Halmahera Utara. Metoda yang digunakan untuk penelitian ini adalah metoda deskriptif, pengambilan sampel menggunakan teknik metoda jelajah di sepanjang jalan yang dilalui. Penapisan alkaloid menggunakan Reagen Mayer, Wagner dan Dragendorff, sampel yang digunakan dari daun yang dewasa, sekitar 2 g. Hasil yang didapatkan sebanyak 70 spesies sampel tumbuhan paku. Hasil penapisan alkaloid diperoleh 30 spesies sampel yang positif mengandung alkaloid. Sampel tersebut adalah Selaginella plana, Cyclopeltis sp., Diplazim dilatatum, Cyclosorus sp., Tectaria angulata , Microlepia sp., Sphaerostephanus unitus , Pteris tripartia , Blechinum sp.1, Nephrolepis biserrata , Selaginella sp.(daun panjang), Diplazium esculentum, Sphaerosthanos sp., Asplenium serra , Lomagramma sumatrana, Thelypteris dentata , Microsorum pteropus, Tectaria sp.1, Nephrolepis undulata, Selaginella delicatula, Pityrogramma calomelanos, Lycopodium phlegmaria, Loxogramme scolopendria, Phyrrosia longifolia , Vittaria elongata, Psilotum sp., Elaphoglossum sp.1, Elaphoglossum sp.2, Adiantum lunulatu dan ada satu spesies yang belum teridentifikasi yaitu sp3. This research to conduct screening of alkaloid compounds in some species of ferns found in North Halmahera. The method used for this research is descriptive method, sampling using the method cruising along the path traversed. Screening of alkaloids using reagents is Mayer, Wagner and Dragendorff, used samples of mature leaves, about 2 g. The results obtained were 70 species of fern samples. Only 30 species positive contain alkaloids. The sample is Selaginella plana, Cyclopeltis sp., Diplazim dilatatum, Cyclosorus sp., Tectaria angulata , Microlepia sp., Sphaerostephanus unitus , Pteris tripartia , Blechinum sp.1, Nephrolepis biserrata , Selaginella sp.(daun panjang), Diplazium esculentum, Sphaerosthanos sp., Asplenium serra , Lomagramma sumatrana, Thelypteris dentata , Microsorum pteropus, Tectaria sp.1, Nephrolepis undulata, Selaginella delicatula, Pityrogramma calomelanos, Lycopodium phlegmaria, Loxogramme scolopendria, Phyrrosia longifolia , Vittaria elongata, Psilotum sp., Elaphoglossum sp.1, Elaphoglossum sp.2, Adiantum lunulatu , and there is one species that has not been identified is Sp3.

Penapisan Alkaloid Pada Tumbuhan Paku dari Halmahera Utara