North American flora.

v. 7, pt. 3 (1912)

North American flora.

v. 7, pt. 4 (1920)

North American flora.

v. 7, pt. 5 (1920)

North American flora.

v. 7, pt. 6 (1921)

North American flora.

v. 7, pt. 7 (1922)

North American flora.

v. 7, pt. 8 (1922)

North American flora.

v. 9 (1907-16)

North American flora.

v. 10, pt. 1 (1914)

North American flora.

v. 10, pt. 2 (1917)

North American flora.

v. 10, pt. 3 (1917)

North American flora.

v. 10, pt. 4 (1924)

North American flora.

v. 10, pt. 5 (1932)

North American flora.

v. 11, pt. 1 (1937)

North American flora.

v. 14, pt. 1 (1923)

North American flora.

v. 15, pt. 2 (1913)