C. H. Ostenfeld

Vascular plants collected in arctic North America (King William Land, King Point and Herschell Isl.) by the Gjöa expedition under Captain Roald Amundsen 1904-1906

A revision of the marine species of Chaetoceras Ehbg. sect. Simplicia Ostf

Halosphaera and Flagellata

Noctiluca and Globigerina

A list of flowering plants from cape York and Melvillebay (NW.-Greenland) collected

A list of Australian sea-grasses

Additions and notes to the flora of extra-tropical west Australia

De i de senere aar i Danmark iagttagne findesteder for mindre almindelige karplanter

The present state of knowledge on hybrids between species of flowering plants

De Danske Farvandes plankton i aarene 1898-1901

Ranunculaceae collected by Ove Paulsen during the Danish expedition to Asia Media in 1898-1899

Castration and hybridisation experiments with some species of Hieracia

De nordiske former av kollektivarten Arenaria ciliata L.

The flora of Greenland

Botanisk have gennem 50 aar. 1874-1924

Phytoplankton of lakes in the Faeroes

Vegetation of North Greenland

Critical notes on the taxonomy and nomenclature of some flowering plants from northern Greenland

Plantes récoltées a la côte nord-est du Grönland

The structure and biology of Arctic flowering plants

Flora arctica

Notes on the phytoplankton of Victoria Nyanza, East Africa

Lieutenant Olufsen's second Pamir-Expedition

Flowering plants and ferns from Wolstenholme Sound

Genetic studies in Polemonium coeruleum

On a new Plasmodiophoracea found in Canada

Additions and corrections to the list of the Phanerogamae and Pteridophyta of the Færöes

The distribution within Denmark of the higher plants

The species of the genus Larix and their geographical distribution

Phytoplanktons from the sea around the Faeröes

List of vascular plants from northeast Greenland (n. of 76n̊.lat.) collected by the Danmark-Expedition

Contribution à la flore de l'île Jan-Mayen

Anemone-og Kobjaelde-Arternas Udbredelse i Danmark

On the ecology and distribution of the Grass-Wrack (Zostera marina) in Danish waters

Note on Halosphaera Schmitz

Genetic Studies in Polemonium

Halophila Aschersonii, n. sp

Experimental and cytological studies in the Hieracia

The flora of Iceland and the Færoes

Plantevæxten paa Færøerne