Karl Emil Hansen Ostenfeld
Karl Emil Hansen Ostenfeld (dan. Carl Emil Hansen Ostenfeld; 3 avqust 1873 – 16 yanvar 1931, Kopenhagen) — Danimarka botaniki, mikoloqu, alqoloqu.
Ostenfeldiella Ferd. & Winge, 1914 (=Plasmodiophora)
Euphrasia ostenfeldii (Pugsley) Yeo, 1971
Hieracium ostenfeldii Dahlst., 1903
Posidonia ostenfeldii Hartog, 1970
Taraxacum ostenfeldii Raunk., 1906
Paulsen, Ove, 1931. C. H. Ostenfeld. Botanisk Tidsskrift, bd. 41.
Nelson, E. Charles & Mary J. P. Scannell, 1978. C. E. H. Ostenfeld's Western Australian plants in the Herbarium, National Botanic Gardens, Glasnevin. Glasra 2: 1–24.