CATALOGUE OF PLANTS. 157 



PONTEDERIACE^. Pickekel-weed Family. 



PONTEDERIA, L. Pickerel-weed. 



P. cordata, L. 



Streams and muddy pond shores ; common. Forms are some- 

 times found corresponding to var. angustifolia (Pursh), Torr. 



XYRIDACEiE. Yellow-eyed Grass Family. 



XYRIS, L. Yellow-eyed Grass. 

 X. flexuosa, Muhl., var. pusilla, Gray. 



Peat bogs and sandy shores; rare and local. Hadlock Ponds 

 (Wm. H. Dunbar, Hand) ; — Breakneck Ponds (A. H. Smith, 

 E. H. Day) ; — Jordan Pond (T. G. White, Eedfield, Annie M. 

 Kaud). It is possible that this may be distinct from X.fiexuosa, 

 and entitled to specific rank. See Bull. Torr. Bot. Club, xix. 38, 

 where this plant is described as Xyria montana, K-ies, — Xyria 

 being an evident typographical error for Xyris. The specific 

 name montana, there chosen, is most unfortunately inappropriate. 



JUNCACE^. KusH Family. 

 JUNCUS, L. EusH. 



J. effusus, L. Common Rush. 

 Very common in wet ground. 



J. filiformis, L. 



Eare. Edge of pool on Heaths Brook, Tremont, near head 

 of the Marsh (M. L. Fernald). 



J. Balticus, Dethard, var. littoralis, Engelm. 



Common in wet brackish ground on the coast. Also on 

 White Beach, southern end of Great Pond (Eand). 



J, Greenei, Oakes & Tuck. 



Dry ground; rare. Sargent Mt. (Eand); — Southwest Har- 

 bor (M. L. Fernald). 



