Bicknell : Ferns and flowkring plants of Nantucket 59 



NAIADACEAE 

 Potamogeton Oakesianus Robbins. 

 Common ; not found in flower or fruit. 



Potamogeton pulcher Tuckerm. 



Occasional or frequent, but scarcely common and not found in 

 flower or fruit. Both this and the foregoing were found in abun- 

 dant fruit on Nantucket by Mr. Morong in 1887. 



Potamogeton Nuttallii Cham. & Sch. 



Infrequent; brook by roadside, Polpis ; Watt's Run. In 

 flower and fruit. Recorded from Maxcy's Pond and from near 

 Sachacha. 



Potamogeton perfoliatus L. 



Common in Long, Hummock, Miacomet, and Washing ponds 

 and fruiting freely. Leaves apparently never of large size, either 

 remote or crowded, broadly ovate or rounded to lanceolate-oblong. 

 Plants frequently small with numerous leaves mostly 10-15 mm. 

 in length and densely fruited spikes only 10 mm. long. Some 

 specimens with remote and unusually narrow leaves suggested an 

 approach to the next. 



Potamogeton mysticus Morong. 



*his little-known plant was searched for unsuccessfully around 

 the D °rders of Miacomet Pond, in which it was found by Mr. 

 Morong in 1887. 



Potamogeton pusillus L. 



Long, Miacomet, and Washing ponds. Fruiting freely in 

 Miacomet Pond, August II, 1906. Recorded also from Hum- 

 m °ck and Reedy ponds. 



OTAMOGETON DIVERSIFOLIUS Raf. 



Maxcy's Pond; pool north of Trot's Swamp; pool on Nan- 

 ucket golf-links ; fruiting abundantly in September. Often with 

 SU mersed ^aves only. Recorded from Reed Pond. 



Potamogeton pectinatus L. 



AbunHin*. :_ r .1 



Rupp 



shore ponds, often intermixed with 

 1(1 niaritima. In September, 1904, a dense growth of these 



