(D. ) Bitter, ?Repert. Spec. Nov. Regni Veg., Beih. 16: 97. 1923.?, 1923.

Bitter, Bitter,, and Bitter, (D. ), ?Repert. Spec. Nov. Regni Veg. 11: 354. 1912.?, 1912.

(D. ) Bitter and Bitter, (D. ), ?Repert. Spec. Nov. Regni Veg., Beih. 16: 78. 1923.?, 1923.

(D. ) Bitter and Bitter, ?Repert. Spec. Nov. Regni Veg. 11: 364. 1912.?, 1912.

(D. ) Bitter, ?Repert. Spec. Nov. Regni Veg., Beih. 16: 280. 1923.?, 1923.

(D. ) Bitter, ?Repert. Spec. Nov. Regni Veg. 19: 269. 1924?, 1924.

(D. ) Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 454. 1919.?, 1919.

(D. ) Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 351. 1919.?, 1919.

(D. ) Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 385. 1919.?, 1919.

(D. ) Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 408. 1919.?, 1919.

(D. ) Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 449. 1919.?, 1919.

(D. ) Bitter and Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 327. 1919.?, 1919.

Bitter and Bitter, (D. ), ?Abh. Naturwiss. Vereine Bremen 24: 326. 1919.?, 1919.

(D. ) Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 493-494. 1919.?, 1919.

(D. ) Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 381. 1919.?, 1919.

(D. ) Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 435. 1919.?, 1919.

(D. ) Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 347. 1919.?, 1919.

(D. ) Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 350. 1919.?, 1919.

(D. ) Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 484. 1919.?, 1919.

(D. ) Bitter and Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 483. 1919.?, 1919.

(D. ) Bitter and Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 481. 1919.?, 1919.

(D. ) Bitter, ?Abh. Naturwiss. Vereine Bremen 24: 374. 1919.?, 1919.

(D. ) Bitter, ?Repert. Spec. Nov. Regni Veg. 17: 354. 1921?, 1921.

(D. ) Bitter and Bitter, (D. ), ?London J. Bot. iv. (1845) 330.?.