PELTANDRA Raf. (Arrow Arum) 



370 P. viRGiNicA Kunth. Alud Pond, Elmhurst, Bigelow Pond. Not 



frequent. 



CALLA L. (Water Arum) 



371 C. PALUSTRis L. Frequent in cold bogs. Atherton's Pond, Moosic 



Lake, Lehigh Pond. 



SYMPLOCARPUS Salisb. (Skunk Cabbage) 



372 S. FOETiDus Nutt. Common in marshy places. 



ORONTIUM L. (Golden Club) 



373 O. AQUATicuM L. Moosic Lake, Spring Brook, Wayne County ponds. 



ACORUS L. (Sweet Flag) 



374 A. CALAMUS L. Common in wet places. 



375 A. CALAMUS, VAR. vARiEGATus Sm. North end of Glenburn Pond. 



G. L. Newbold* 



LEMNACEAE (Duckweed Family) 

 SPIRODELA Schleid. 



376 S. POLYRHiZA Schleid. Kingston pond holes. 



LEMNA L. (Duckweed, Duck's Meat) 



377 L. PERPUSiLLA Torr. Tobyhanna, Lehigh Pond. 



378 L. MINOR L. Common in ponds. 



ERIOCAULACEAE (Pipewort Family) 

 ERIOCAULON L. (Pipewort) 



379 E. ARTicuLATUM Morong. Moosic Lake, Lake Winola. Not rare. 



XYRIDACEAE (Yellow-Eyed Grass Family) 

 XYRIS L. 



380 X. MONTANA Ries. Moosic Lake. Not infrequent. 



381 X. CAROLiNiANA Walt. Long Pond, Luzerne County. Rare. 



COMMELINACEAE (Spiderwort Family) 

 TRADESCANTIA L. 



382 T. viRGiNiANA L. La Plume. Not an infrequent escape. 



COMMELINA L. (Day-Flower) 



383 C. COMMUNIS L. Everhart Island. 



384 C. VIRGINICA L. Hyde Park. Common. 



PONTEDERIACEAE (Pickerel-Weed Family) 

 PONTEDERIA L. (Pickerel-Weed) 



385 P. coRDATA L. Atherton's Pond, Mud Pond, Moosic Lake. 



HETERANTHERA R. and P. (Mud Plantain) 



386 H. DUBiA MacM. Kingston pond holes. 



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