62 Bicknell : Ferns and flowering plants of Nantucket 



ZOSTERA MARINA L. 



Common at the western side of the island and off the north 

 shore and often cast up along the beaches. 



SCHEUCHZERIACEAE 



TrIGLOCHIN MARIT1MA L. 



Salt marshes at Eatfire and Quaise; abundant along Bache's 

 Harbor; dried spikes only, carpels 3.5-5 mm - long. 



ALISMACEAE 

 Alisma subcordatum Raf. 



Pool by the railroad near the Orange Street crossing; the 

 colony of plants is a small one and has not increased since 1889, 

 when it was first observed. Near the Creeks, M. L. O. 



*Sagjttaria Engelmanniana J. G. Smith. 



Common in wet bogs and about the borders of ponds and 

 showing a much wider variation in size and leaf-form than is 

 allowed for in current descriptions : Lamina of the blade linear to 

 ovate, 1 mm. to over 4 cm. wide, the lobes nearly parallel to 

 widely diverging, 1 mm. to 2.5 cm. wide at base, 3-1 1 cm. long, 

 tapering to an almost filiform termination. Varies greatly in its 

 flowering period in different seasons, but appears to be generally 

 later-flowering than Sagittaria latifolia. In 1904 it was in full 

 flower in the second week of August; in 1906 at the middle of 

 September much of it was only just in bloom ; in 1899 flowers 

 and mature fruit were found at the middle of September ; in Sep- 

 tember, 1907, it was in mature fruit and no flowers were seen. 



Sagittaria latifolia Willd. 



Rare, found only in ditches along a roadway through low 

 grounds west of the town, occurring sparingly but of the largest 

 size. The tallest plants were 1.15 m. high, the largest leaves 



1.20 m. in length, their blades 2.75 dm. long by 1.5 dm. wide at 

 the petiole, the terminal portion rounded to broadly acute. 



In full flower Aug. 7, 1906; no flowers remaining Sept. H> 



1907. 



VALLISNERIACEAE 



Vallisneria spiralis L. 



Common in Hummock and Miacomet Ponds, at the latfc 

 flower and fruit Sept. 14, 1907. Recorded from Long Pond. 





