(D. ) Bitter, ?Bot. Jahrb. Syst. 54: 505. 1917.?, 1917.

Bitter and Bitter, (D. ), ?Bot. Jahrb. Syst. 54: 506. 1917.?, 1917.

(D. ) Bitter, Dammer,, Bitter,, and Bitter, ?Bot. Jahrb. Syst. 54: 467. 1917.?, 1917.

(D. ) Bitter, ?Bot. Jahrb. Syst. 54: 459. 1917.?, 1917.

Bitter, Bitter,, and Bitter, (D. ), ?Bot. Jahrb. Syst. 54: 461. 1917.?, 1917.

(D. ) Bitter, ?Bot. Jahrb. Syst. 54: 427. 1917.?, 1917.