FLOKA OF THE LITER SUSQUEHANNA. lU 



vi:ratrl'm l. 



V. viride Ait. Whitk Hiilei:"RI::, Im-ian Puke. Common 

 along streams and in other low grounds. Stem tall, very leafy ; 

 leaves ovate, strongly veined and plaited: flowers greenish, in a 

 terminal pyramidal panicle. A characteristic plant in all wet 

 places. Root poisonous. 



PONTEDERIACE/E. 



POXTEDERIA L. 



P. cordata L. Pickerel-Weed. Rare. Borders of lakes and 

 ponds, Graves. Carmalt Lake, Fenno. Elsewhere not re- 

 ported. Found in shallow water. Leaves cordate, long 

 petioled ; flowers blue, in a dense spike. A common plant that 

 is rare with us for want of suitable localities in which to grow. 



. HETERANTHERA R. & P. 



H. dubia ( Jacq. ) Mac^L Water Star-grass. Mid Plantain. 

 Common in shallow water on the borders of our larger streams. 

 Not always submersed. Leaves long, grass-like; flowers small, 

 yellow, with a long, thread-like tube. Aug. ( H. graminea 



Vahl.) 



The common spiderwort ( Tradescantia Virguiiana L. ) 



belongs here. It is occasionally found as an escape about old 

 buildings, but does not persist long in a wild state. Common 

 in cultivation. 



JUNCACE/E. 



JUNCUS L. 



J. effusus L. Common Rush. Bulrlsii. Bijc, Rish. Abun- 

 dant in all swamps and wet grounds. 



J. marginatus Rostk. Grass-leaved Rl sh. Plentiful in moist 

 grounds, Graves ; Fenno. Elsewhere not reported. 



J. tenuis Willd. Slender Rlsh. Abundant throughout in wet 

 or dry soil. Frequent along paths. 



