Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 401. 1920.?, 1920.

Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 389. 1920.?, 1920.

Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 397. 1920.?, 1920.

Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 394. 1920.?, 1920.

Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 403. 1920.?, 1920.

Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 390. 1920.?, 1920.

Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 404. 1920.?, 1920.

Bitter, Bitter,, Bitter,, and Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 406. 1920.?, 1920.

Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 395. 1920.?, 1920.

Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 402. 1920.?, 1920.

Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 398. 1920.?, 1920.

Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 400. 1920.?, 1920.

Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 408. 1920.?, 1920.

Bitter, ?Repert. Spec. Nov. Regni Veg. 16: 396. 1920.?, 1920.

Bitter, ?Abh. Naturwiss. Vereins Bremen 24: 435. 1920?, 1920.

Bitter, ?Abh. Naturwiss. Vereins Bremen 24: 327. 1920?, 1920.

Bitter, ?Abh. Naturwiss. Vereins Bremen 24: 440. 1920?, 1920.

(D. ) Bitter, Bitter,, Bitter,, and Bitter, ?Bot. Jahrb. Syst. 57: 17. 1920.?, 1920.

Bitter, ?Abh. Naturwiss. Vereins Bremen 24: 520. 1920?, 1920.