(C. H. W. ) Bitter, ?Repert. Spec. Nov. Regni Veg., Beih. 16: 116. 1923.?, 1923.

(C. H. W. ) Bitter, ?Bot. Jahrb. Syst. 54: 449. 1917.?, 1917.

(C. H. W. ) Bitter, ?Repert. Spec. Nov. Regni Veg., Beih. 16: 23. 1923.?, 1923.

(C. H. W. ) Bitter, ?Repert. Spec. Nov. Regni Veg., Beih. 16: 56. 1923.?, 1923.

A. S.  ex Bitter and Bitter, (C. H. W. ), ?Repert. Spec. Nov. Regni Veg., Beih. 16: 191. 1923.?, 1923.

(C. H. W. ) Bitter and Bitter, (D. ), ?Repert. Spec. Nov. Regni Veg., Beih. 16: 170. 1923.?, 1923.