188 Lake Maxinkuckee, Physical and Biological Survey 

 42. TRUE WATER-CRESS 



SISYMBRIUM NASTURTIUM-AQUATICUM Linnaeus 



Scattered in various places along the lake shore, as, at the 

 Barnes cottage, along the north side near the Culver pier, and down 

 near Farrar's. The largest patch was in the mouth of the small 

 creek which enters the lake near the road, at Culver Bay. 



43. KNOTTED SPIKE-RUSH 



ELEOCHARIS INTERSTINCTA (Vahl) 



This interesting plant is of local distribution in the lakes, there 

 being several patches in Lake Maxinkuckee as follows : 



(1) A large irregular patch north of Winfield's, extending in 

 a sharp point some distance out into the water. 



(2) A patch in the water opposite the hill between the pump- 

 ing station and depot. 



(3) A patch south of Farrar's, opposite the beginning of the 

 forest. 



(4) A good patch out from the hill southwest of the lake where 

 the high bank comes down to the lake. 



(5) Great patches by the green boathouse. 



There was also a large patch in Lost Lake along the southwest 

 shore. 



This plant grows in rather dense patches, and projects high 

 above the water, so the distribution is easily made out. In gen- 

 eral appearance it resembles an Equisetum. The fruit is a cone- 

 like affair. In the autumn the plants assume a beautiful golden 

 color, but the tops quite quickly succumb to the frost and lop over. 

 The plants showed above the surface of the water by May 30, 1901. 

 The seeds are shed in autumn before the water freezes. The 

 plants of this species are extensively used by the muskrats in the 

 fall in building their winter houses. 



44. ANGLED SPIKE-RUSH 



ELEOCHARIS MUTATA (Linnseus) 



Only one small patch of this spike-rush was found in the lake 

 and this was in the neighborhood of the green boathouse west of 

 Norris Inlet. The patch was so mixed in with other weeds bul- 

 rushes and arrow-heads that it was difficult to find. It grows in 

 shallow water, hardly more than a foot deep, and projects well out 

 of the water. 



