Cactaceae of Wheeler's exploration
Published: 1887
Place of publication: Cambridge, Mass
Language: eng
Notes: From the Botanical Works of the late George Engelmann, collected for Henry Shaw, Esq., p. 233-235. 1887.

"From Report upon United States Geographical Surveys west of the One Hundredth Meridian, in charge of First Lieutenant George M. Wheeler, U. S. Engineer. Published by Engineer Department. Vol. VI, Botany, by J. T. Rothrock. 1878," p. 127-132.