242 Lake Maxinkuckee, Physical and Biological Survey 

 122. BRIGHT GREEN SPIKE-RUSH 



ELROCHARIS OLIVACEA Ton. 



Some of our specimens collected appear to be this species. It 

 is, in general, a coast species but has been reported for the state 

 in Gibson and Lake counties. 



123. BLUNT SPIKE-RUSH 



ELEOCHARIS OBTUSA (Willd.) Schultes 



Common about the lake on wet sandy shores. Patches were 

 found at Green's pier, by Overmyer's, on the flat east of Lakeview 

 Hotel and at Long Point. It was also found at Fletcher's Lake. 



A form identified as E. ohtusa jejuna was abundant in a kettle- 

 hole in Green's clover field. Found in fruit October 24, 1900. 



124. CREEPING SPIKE-RUSH 



ELEOCHARIS PALUSTRIS (L.) R. & S. 



This is one of the most common spike-rushes in the vicinity of 

 the lake. It grows in moist sandy shore at various places — such 

 as at Long Point and near Norris Inlet. It grows out for some 

 distance into the water, the plants in water where the growth is 

 not thick standing in straight rows as if in drills along the under- 

 ground rootstock. The plants showed up well above the water by 

 May 28, and were in blossom by June 6, 1901. 



The creeping spike-rush is exceedingly variable in size and gen- 

 eral appearance. 



The form known as E. palustris glcmcescens, a very stout tall 

 spike-rush, is fairly common about the lake, and was obtained in 

 Green's marsh, along the shore of Lake Maxinkuckee south of 

 Green's, and at Lost Lake. As the forms occur at the lake they are 

 quite distinct without any tendency to vary into each other. 



125. NEEDLE SPIKE-RUSH 



ELEOCHARIS ACICULARIS (L.) R. & S. 



This is the most minute and slender of our spike-rushes, the 

 dense short clumps covering the ground where they grow like a 

 minute bright-green growth of hair. The needle spike-rush grows 

 in a greater variety of situations and at a greater distance from 

 the lake than the other species, and varies considerably with the 

 situation in which it is found. Some grew along the lake shore 

 south of Arlington hotel, and in the swamp below Farrar's. It 

 was still green, but being washed out by the choppy waves, at the 

 edge of Lost Lake on November 2, 1904. On April 2, 1901, it 



