Lake Maxinkuckee, Physical and Biological Survey 215 



in the water as P. robbinsii, as it stands erect and is usually seen 

 only at an angle. It is quite fragile and easily torn and tattered 

 by handling. It remains green all winter. 



38. EEL-GRASS PONDWEED 



POTAMOGETON COMPRESSUS L. 



Quite common; more abundant between 10 and 16 feet, but 

 ranging from 2 to 26 feet. 



One of the less conspicuous pondweeds with a much flattened 

 stem and rather narrow grass-like leaves. The whole plant is im- 

 mersed, and it prefers rather deep water. This plant propagates 

 by the formation of peculiar fan-shaped winter buds in which the 

 2-ranked flat leaves are closely appressed. A bud was found 

 washed up April 13, 1901, much crooked as from heliotropism. 

 Many were raked up during the winter. On May 29, 1901, a bud, 

 very crooked, was noticed growing. The leafy stem springs from 

 the apex of the bud and roots from axils of old leaves. 



39. FRIES' PONDWEED 



POTAMOGETON FRIESII Ruprecht 



Widely distributed in water from 8 to 24 feet ; more abundant 

 between 12 and 16 feet. Frequently encountered in dredge hauls ; 

 a little found in a 12-10 foot haul on half section line 22, dragging 

 from a shore bar toward a lake bar, and still more was found in a 

 haul in from 14 to 12 feet of water. It occasionally bears winter 

 buds some of which were obtained March 27, 1901. It does not 

 grow in patches, but occurs scattered among other plants. Some 

 was found up Aubeenaubee Creek during a seining trip September 

 3, 1900. 



40. SMALL PONDWEED 



POTAMOGETON PUSILLUS L. 



A small insignificant species likely to escape notice. More com- 

 mon in the southeastern portion of the lake in water ranging from 

 10-24 feet deep. It was also probably somewhat frequent along 

 shore near the Inlet in shallow water; some very small Pota- 

 mogetons were observed there but they were thought to be de- 

 pauperate forms at the time. It is doubtless an inhabitant of shal- 

 low water at times, as the flowers and fruit are known and de- 

 scribed in the manuals. It also propagates extensively by propa- 

 gating buds. 



