ˈælbɚt tʃˈɑːɹlz smˈɪθ ˈeɪpɹəl fˈaɪv, nˈaɪntiːnhˈʌndɹɪd sˈɪks mˈeɪ twˈɛnti θɹˈiː, nˈaɪntiːnhˈʌndɹɪd nˈaɪnti nˈaɪn wʌz ɐn ɐmˈɛɹɪkən bˈɑːtɐnˌɪst hˌuː sˈɜːvd æz dᵻɹˈɛktɚɹ ʌvðə nˈæʃənəl mjuːzˈiəm ʌv nˈætʃɚɹəl hˈɪstɚɹi ænd ˈɑːɹnəld ˈɑːɹboːɹˌɛɾəm ænd wʌzðə fˈɔːɹmɚ pɹˈɛzɪdənt ʌvðɪ ɐmˈɛɹɪkən səsˈaɪəɾi ʌv plˈænt tæksˈɑːnəmˌɪsts.
Albert Charles Smith (April 5, 1906 – May 23, 1999) was an American botanist who served as director of the National Museum of Natural History and Arnold Arboretum and was the former president of the American Society of Plant Taxonomists.