132 METROPOLITAN PARK FLORA. 
COLEOCHAETE, Bréb. 
C. orbicularis, Prings. 
M, on under surface of Nuphar and Nymphea 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. 
FLORIDEAE. 
CHANTRANSIA, Fries. 
C. Hermanni (Roth), Desv. 
M, Spot Pond brook, Virginia Wood, in rapid current or at 
falls. 
BATRACHOSPERMUM, Roth.+ 
B. Boryanun, 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. 
+B. Decaisneanum, 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. 

