?Bot. Mag. (Tokyo) 6: 53, 1892?. Submitted.

?Acta Phytotax. Geobot. 7: 122, 1938?. Submitted.

?Bot. Mag. (Tokyo) 40: 487, 1926?. Submitted.

?Revis. Gen. Pl. 2: 387, 1891?. Submitted.

?Mem. Acad. Imp. Sci. St.-Petersbourg, Ser. 7 16(9): 26, t. 2, f.106, 1870?. Submitted.