132 METROPOLITAN PARK FLORA. 



COLEOCH^ETE, Breb. 

 C. orbicularis, Prings. 



M, on under surface of Nuphar and JSfymphcea leaves, Spot 

 Pond. 



VAUCHERIA, DC. 



V. geminata (Vauch.), DC.,var. racemosa, Walz. 



M, dense floating masses, swamp near Highland Ave., Med- 

 ford. 

 V. sessilis (Vauch.), DC. 



M, in moist places, but not under water, Cascade and Vir- 

 ginia Wood. 



V. terrestris (Vauch.), Lyng. 

 M, under water, edge of Spot Pond. 



FLORIDE^E. 



CHANTRANSIA, Fries. 



C. Hermann! (Roth), Desv. 



M, Spot Pond brook, Virginia Wood, in rapid current or at 

 falls. 



BATRACHOSPERMUM, Roth.f 

 B. Boryanum, Sirdt. 



M, common in brooks in spring. 

 B. pyramidale, Sirdt. 



M, brook by Highland Ave., Medford. 

 B. radians, Sirdt. 



M, Spot Pond brook, Virginia Wood. 

 B. virgatum, Sirdt. 



M, Spot Pond brook, Virginia Wood, chiefly ■ in spring, like 

 the other species of this genus. 



fB. Decaisneamim, Sirdt., has been found just outside the Fells 

 Reservation limits in a spring in a hollow between Fulton and Elm 

 Sts. It is the only recorded station in America. 



