CATALOGUE OF PLANTS. 161 



Forma angustifolia. 



Near Bar Harbor (F. M. Day) ; Seal Cove Pond ; Eipples 

 Pond (Band) ; Somesville (R. & R.). 



S. graminea, MX. 



Infrequent. Somes Stream (W. H. Dunbar, R. & R., Arnold 

 Greene); Great Pond; Seal Cove Pond (Rand). 



NAIADACE^E. PONDWEED FAMILY, 



TRIGLOCHIN, L. ARROW GRASS. 

 T. maritima, L. 



Common in salt marshes, and on muddy coast shores. 



SCHEUCHZERIA, L. 

 S. palustris, L. 



Rare. Sunken Heath (Faxon, Rand); The Heath, Great 

 Cranberry Isle (R. & R.). 



POTAMOGETON, L. PONDWEED. 

 P. natans, L. 



Ponds and deep streams; frequent. Seal Cove Pond; Great 

 Pond (Rand) ; Somes Pond (R. & R.); Northeast Creek; 

 Witch Hole (Redfield). 



P. Oakesianus, Robbins. 



Rare. Northeast Creek; Bubble Pond (R. & R.). 

 P. Pennsylvanicus, Cham. P. Claytonii, Tuck. 



Common in ponds, streams, and ditches. A very slender 

 deep-water form, Somes Pond (Rand). 



P. hybridus, MX. P. diversifolius, Raf. 



Rare. Ripples Pond (Fernald, Rand). With and without 

 floating leaves. 



P. perfoliatus, L. 



Infrequent. Long Pond ; Jordan Stream (Redfield) ; North- 

 east Creek (E. Faxon, Rand, M. L. Fernald). 



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