1857. On the age of a large Californian coniferous tree. III. 94-97.
1861. Characters of some Compositæ in the collection of the United States South Pacific Exploring Expedition. V. 114-146.
1861. Enumeration of a collection of dried plants made by L. J. Xantus in Lower California. V. 153-173.
1861. Characters of new or obscure species of plants of Monopetalous orders in the collection of the United States Pacific Exploring Expedition. V. 321-352; VI. 37-55.
1864. A revision and arrangement (mainly by the fruit) of the North American species of Astragalus and Oxytropis. VI. 188-236.
1865. Characters of some new plants of California and Nevada, from the collections of Prof. William H. Brewer and Dr. Charles L. Anderson. VI. 519-556.
1870. A revision of the Eriogoneæ (with J. Torrey). VIII. 145-200.
1870. Reconstruction of the order Diapensiaceæ; revision of the North American Polemoniaceæ; miscellaneous botanical notes and characters. VIII. 243-296.
1872. Notes on Labiatæ; determinations of a collection of plants made in Oregon by Elihu Hall. VIII. 365-412.
1873. Characters of new genera and species of plants. VIII. 620-631.