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

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

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