North American flora.

v. 15A, pt. 1 (1946)

North American flora.

v. 16, pt. 1 (1909)

North American flora.

v. 17, pt. 1 (1909)

North American flora.

v. 17, pt. 2 (1912)

North American flora.

v. 17, pt. 3 (1915)

North American flora.

v. 21, pt. 1 (1916)

North American flora.

v. 21, pt. 2 (1917)

North American flora.

v. 22, pt. 1 (1905)

North American flora.

v. 22, pt. 2 (1963)

North American flora.

v. 22, pt. 3 (1908)

North American flora.

v. 22, pt. 4 (1908)

North American flora.

v. 22, pt. 5 (1963)

North American flora.

v. 29, pt. 1 (1914)

North American flora.

v. 29, pt. 2 (1938)

North American flora.

v. 21, pt. 3 (1918)