Lake Maxinkuckee, Physical and Biological Survey 241 

 119. SLENDER CYPERUS 



CYPERUS FILICULMIS Vahl 



This tall wiry-stemmed sedge is not conspicuous, in spite of the 

 fact that it is one of the tallest species of the genus. It is found 

 rather scattered in the neighborhood of the lake, especially in the 

 grass along the railroad in the region of Murray's. It grows in 

 dry sterile soil. Over in the dune region where hardly anything 

 else would grow, it helped form a scanty growth over the shifting 

 sand. 



Its usual period of flowering is from June through August, but 

 along the railroad where the herbage is usually kept mown down or 

 burned over, it was found in flower as late as September 27. 



120. KNOTTED SPIKE-RUSH 



ELEOCHARIS INTERSTINCTA (Vahl) R. & S. 



The knotted spike-rush, the most conspicuous species of the 

 genus, is not rare at Lake Maxinkuckee. It is quite local in distri- 

 bution, however, and is found in dense patches where it occurs. 

 There are a few small patches along shore near Overmyer's field and 

 near the Inlet. Besides this it occurs nowhere else except in 2 

 large patches, one between Winfield's and the depot and one in 

 Lost Lake below the Bardsley cottage. In each of these cases the 

 patch extends from shallow water near shore into long cape-like 

 extensions into the water. The plant, though it bears abundant 

 seed, seems to propagate chiefly by rootstocks which accounts for 

 its occurrence in dense patches and its absence as isolated scattered 

 plants. The plants were up well and beginning to show conspicu- 

 ously above the surface of the water by May 30. They bear a 

 marked general resemblance to the stout scouring-rush, Equisetum. 

 In autumn the whole patches assume a beautiful golden color. They 

 were in their autumnal glory on October 21, 1900, and the cones 

 were full of seeds. They quickly succumb to frost and lop over 

 into the water. 



121. ANGLED SPIKE-RUSH 



ELEOCHARIS MUTATA (L.) R. & S. 



This spike-rush is rare at Lake Maxinkuckee, only 1 small patch 

 having been found, intermixed with bulrushes, in the vicinity of 

 Norris Inlet. At Eagle Lake, Kosciusko County, it was fairly 

 common. This plant grows in water of about a foot in depth, 

 and is never found on shore much beyond the water's edge. 



16 17618 Vol. 2 



