Dolchspitzige Segge und Sand-Segge, A: Carex mucronata Gaudin - Dagger-tailed Sedge, B: Carex arenaria L. - Sandsegge, Family: 25. Cyperaceae - Ried Grass, Plate 91, after p. 210 (Bd. 1), 1886, Otto Wilhelm Thom?: Prof. Dr. Thom?'s Flora von Deutschl