Schltr., ?Bot. Jahrb. Syst. 40 Beibl. 92: 34. 1908.?, 1908.

Schltr., ?Bot. Jahrb. Syst. 40, Beibl. 92: 33. 1908.?, 1908.

Schltr. and Schltr., ?Bot. Jahrb. Syst. 40, Beibl. 92: 34. 1908.?, 1908.