72 Rhodora [APRIL 
REPORTS ON THE FLORA OF THE BOSTON DISTRICT, —IX. 
CYPERACEAE. 
ELEOCHARIS. 
E. acicularis (L.) R. & S. Swamps and muddy places by ponds 
and streams. Common from the Blue Hills north and west; doubtless 
throughout southern area, but not reported. 
E. Engelmanni Steud. Sluice Pond, Lynn (H. A. Young, Sep- 
tember, 1879); Pine Hill, Medford, Aug. 19, 1880 (C. W. Swan); 
wet sand and muddy shore, Winter Pond, Winchester (various col- 
lectors down to Sept. 15, 1906); in mud of shore, pond, Mill St., 
Westwood (K. M. Wiegand, July 23, 1908); gravelly shore, rather 
abundant, Reservoir, Wayland (K. M. Wiegand, July, 1908, no 
specimens taken). 
E. Engelmanni Steud., var. detonsa Gray. Muddy and sandy 
"shore, Winter Pond, Winchester (various collectors from Aug. 28, 
1878, to October, 1908); “near Woburn” (E. H. Hitchings, 1878); 
Waltham (B. D. Greene). 
E. interstincta (Vahl) R. & S. In water up to depth of four feet, 
Lake Waban, Wellesley (T. Morong, Aug. 13, 1883; L. W. Riddle, 
Sept. 19, 1906; K. M. & M. C. Wiegand, Sept. 19, 1907). Only 
station in the State. 
E. obtusa (Willd.) Schultes. Muddy and wet sandy places, com- 
mon throughout. 
E. olivacea Torr. Wet sandy and muddy soil, occasional through- 
out. In Scituate this was found in a brackish bog back of a beach by 
E. F. Williams and W. P. Rich, Sept. 8, 1901. 
E. ovata (Roth) R. & S. Wet places; Tewksbury, Winchester, 
Medford, Concord, Dedham, Sharon. 
E. palustris (L.) R. & S. In water and wet meadows, abundant 
throughout. 
E. palustris (L.) R. & S., var. glaucescens (Willd.) Gray. Occa- 
sional throughcut. 
E. quadrangulata (Michx.) R. £ S. Shallow water, Lake Waban, 
Wellesley (K. M. Wiegand, July 20, 1908). Only station in the State. 
E. Robbinsii Oakes. Shallow water, still or flowing; occasional in 
central and northwestern portion; to be looked for throughout. 
