C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 232, pl. 23, fig. 2. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 233, pl. 14, figs. 29-31; pl. 22. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 304. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 237, pl. 15, figs. 19-21; pl. 23, fig. 1. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 225, pl. 14, figs. 23-35; pl. 21. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 210. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 295. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 313, fig. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 218, pl. 14, figs. 32-34; pl. 20. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 250, pl. 15, figs. 13-15. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 248, pl. 15, figs. 7-9; pl. 18, figs. 1-3. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 249. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 242. 1932?, 1932.

C.L.Hitchc., ?Ann. Missouri Bot. Gard. 19: 280. 1932?, 1932.