214 Lake Maxinkuckee, Physical and Biological Survey 

 35. SHINING PONDWEED 



POTAMOGETON LUCENS L. 



Potamogeton lucens is widely scattered in small patches through 

 the lake in shallow water, and is usually mixed in with other pond- 

 weeds such as P. amplifolius, P. perfoliatus and the like. It usually 

 grows in quite small patches with only a few plants to the patch, 

 although there was a fairly large patch about 500 feet from the ice- 

 elevator at the depth of 4 or 5 feet. In general form it resembles 

 P. natans or the still-water forms of P. americanus from which 

 it can be distinguished by its shining leaves. What was thought 

 to be this was seen in flower by Norris Inlet, June 24, 1901, al- 

 though its usual time of flowering is in September and October. 

 It remains green all winter, even the floating leaves not decaying 

 in the fall, but becoming embedded in the ice during the winter. 



36. WHITE-STEMMED PONDWEED 



POTAMOGETON PRAELONGUS Wulf. 



This is one of the rarer pondweeds of the lake and is only infre- 

 quently seen, so that not much is known of its distribution or 

 habits. Some was dredged up at the Weedpatch August 28, 1900. 

 On September 29 of the same year some was found washed up on 

 shore at the depot grounds. On May 30, 1901, some was noted 

 sending up flowerbuds from a patch of P. amplifolius in the north 

 end of the lake. On November 9, 1904, some was noted washed 

 up green at shore near the icehouses. It is one of the species found 

 in rather deep water, and from occasional bits seen, it is evident 

 that it remains green all winter. 



37. CLASPING-LEAVED PONDWEED 



POTAMOGETON PERFOLIATUS L. 



This is not a common Potamogeton at the lake and, like P. 

 praelongus, is known chiefly from occasional plants, or fragments 

 seen mixed in with other pondweeds. It is rather common in Eagle 

 Lake near Warsaw. Some plants were found in Lake Maxin- 

 kuckee, growing in sandy bottom in shallow water in the northwest 

 corner of Outlet Bay. A good patch was also found, in 1904, near 

 the icehouses. In form this is one of the most regular and attract- 

 ive of the pondweeds, the broad wavy close-set dark green leaves 

 in two ranks giving it the appearance of a full plume, quite differ- 

 ent from the broad open plume of P. robbinsii. It is not as showy 



