1906] Fernald, — Some new or little known Cyperaceae 127 



pond, Centreville, August 5, 1901 (Clara Imogene Cheney) : New 

 Jersey, pine barrens, without definite locality {Cray, Gram. & Cyp. 

 no. 71, in part); swamps near Atsion, September 26, 1867 (C F. 

 Parker). 



Usually producing fewer bulblets than C. dentaius, and in its elon- 

 gate spikelets and less prominent scale-tips appearing quite distinct. 

 Numerous transitional specimens occur, however, and both extremes 

 are sometimes mixed on the herbarium-sheets under one label; for 

 example. Dr. Gray's New Jersey material in the Gray Herbarium 

 and Mrs. Cheney's sheet of Centreville plants in the Herbarium of 

 the New England Botanical Club. 



Cyperus hystricinus, n. sp. Perennial by short branching root- 

 stocks: the slender smooth rigid culms 2 to 5 dm. high, rising from 

 hard corm-like bases, much exceeding the stiff narrow (2 to 5 mm. 

 broad) smooth leaves: umbel of 3 to 10 smooth simple spreading- 

 ascending rays, mostly shorter than the involucre: spikelets 1-2- 

 flowered, subulate, rigid, 3 to 7 mm. long, densely crowded in cylindric 

 or narrowly obovoid heads (1 to 2.5 cm. long), strongly reflexed, golden 

 brown at maturity: scales closely appressed, the fertile strongly nerved, 

 the terminal involute-subulate: achenes linear-cylindric, 2 to 2.5 

 mm. long. — - New Jer.sey, sandy fields, near Haddonfield, October 

 13, 1867 — type {C. F. Austin): Pex.\sylvania, near Philadelphia, 

 1862 (C. E. Smith): M.a.ryland, sandy fields, Salisbury, August, 

 1894 (W. M. Canhy): Georgia, drv sandy soil south of Americus, 

 July 20, 1901 {R. M. Harper, no. 1131). 



Usually confused in the herbarium with C. retrofractus (L.) Torr., 

 which has the culms scabrous at least above, the leaves short-pubes- 

 cent, the few rays of the umbel mostly upright and longer than the 

 involucre, and the spikelets in a conspicuously turbinate head. The 

 differences between this plant and C. retrofractus were known to the 

 late Charles E. Smith, whose specimens are accompanied by detailed 

 notes indicating that the "rough" plant, C. retrofractus, is earlier 

 mature than the smooth C. hystricinus. 



Cyperus dipsaciformis, n. sp. Perennial from corm-like bases: 

 culms scabrous at least above, 2.5 to 8 dm. high: leaves shorter than 

 the culms, scabrous-hispid above, 4 to 9 mm. wide: umbel 4-12- 

 rayed, some of the ascending rays often equalling the involucre: 

 spikelets 1-3-flowered, subulate, rigid, 6 to 11 mm. long, crowded 

 in cylindric or subcylindric heads (1.5 to 4 cm. long), strongly reflexed, 

 yellow-brown at maturity: fertile scales with green midribs: achenes 

 3 mm. long. — ■ Delaware, woods, New Castle County, and near 

 Wilmington, 1864 (IF. M. Canhy): District of Columbia, along 

 Rock Creek, Washington, 1868 (F. Pech); "in coUibus siccis, apricis, 



