Scrophulariaceae of the central Rocky mountain states,
Pennell, Francis W. 1886-1952.
Scrophulariaceae of the central Rocky mountain states, by Francis W. Pennell. - Washington, Govt. print. off., 1920. - v, 313-381, vii-viii p. 25 cm. - Smithsonian institution. United States National museum. Contribuitons from the United States National herbarium. v. 20, pt.9 .
Also considered as Contribution from the New York botanical garden, no. 219.
agr20000972
Scrophulariaceae--Rocky Mountains Region.
QK495.S43 / P4
Scrophulariaceae of the central Rocky mountain states, by Francis W. Pennell. - Washington, Govt. print. off., 1920. - v, 313-381, vii-viii p. 25 cm. - Smithsonian institution. United States National museum. Contribuitons from the United States National herbarium. v. 20, pt.9 .
Also considered as Contribution from the New York botanical garden, no. 219.
agr20000972
Scrophulariaceae--Rocky Mountains Region.
QK495.S43 / P4