Studi tentang karakteristik morfologis ubikayu (manihot esculenta crantz) dianggap penting untuk memahami kondisi aktual dan faktual sumber daya pangan lokal. penelitian ini dilakukan di 4 (empat) kecamatan di kota tarakan kalimantan utara pada bulan januari hingga juli 2022. area pengambilan sampel pada kelurahan mamburungan, karang haraapan dan juata laut sebagai tempat penelitian. tujuan dari penelitian ini adalah untuk mengindentifikasi karakteristik morfofisiologis dan sebaran varietas ubikayu berdasarkan identifikasi lokasi tumbuh dan budidaya ketiga area sampel. parameter yang diidentifikasi yaitu karakter morfologis. karakter morfologi tanaman ubi kayu yang di amati meliputi (1) daun ; warna daun, warna pucuk daun, warna tangkai daun, bentuk daun, jumlah lobus daun, panjang lobus daun, panjang tangkai daun. (2) batang; warna kulit batang, warna batang. (3) umbi; panjang umbi, diameter umbi, jumlah umbi, bobot umbi, warna daging umbi. hasil identifikasi ubikayu pada 4 (empat) kecamatan di tarakan terdapat varietas ubikayu yang banyak di budidayakan oleh petani yaitu pada varietas ubikayu adira. hasil penelitian menerangkan bahwa terdapat berbagai varietas tanaman ubikayu yang dibudidaya petani di tarakan yaitu varietas: adira, dayak, gading, gajah, mentega, dan karet. kata kunci: karakteristik, morfologis, budidaya & ubi kayu

The study of the morphological characteristics of cassava (manihot esculenta crantz) is considered important to understand the actual and factual conditions of local food resources. this research was conducted in 4 (four) sub-districts in tarakan city, north kalimantan from january to july 2022. the sampling area was in the kelurahan mambirdan, karang haraapan and juata laut as research sites. the purpose of this study was to identify the morphophysiological characteristics and distribution of cassava varieties based on the identification of growing locations and cultivation of the three sample areas. the parameters identified were morphological characters. the morphological characters of cassava plants observed included (1) leaves; leaf color, leaf color, petiole color, leaf shape, number of leaf lobes, leaf lobe length, leaf stalk length. (2) trunk; bark color, stem color. (3) bulbs; tuber length, tuber diameter, tuber number, tuber weight, tuber flesh color. the results of the identification of cassava in 4 (four) districts in tarakan there are cassava varieties that are widely cultivated by farmers, namely the adira cassava variety. the results of the study explained that there are various varieties of cassava plants that are cultivated by farmers in tarakan, namely the varieties: adira, dayak, ivory, elephant, butter, and rubber. keywords: characteristics, morphology, cultivation & cassava