116 FLORA OF THE UPPER SUSQUEHANNA. 



ORONTIUM L. 



O. aquaticum L. Goldex Clip.. Rare. Brisbin Pond ; Jam 

 Pond, Coiille. Bog near Jarvis street Binghamton ; Thomp- 

 son's marsh; plentiful at the latter station, Clute. Elsewhere 

 not reported. This plant is abundant in certain lakes just south 

 of our range, where it is reported to have been planted by In- 

 dians. It may possibly occur at a few other stations within our 

 limits. Found always in very wet soil, often in standing water. 

 Leaves oblong, on long petioles ; spadix near the tip of a long, 

 slender scape. A curious plant, well named from its inflor- 

 escence — a golden club. 



ACORUS L. 



A. Calamus L. Sweet Flag. ■ CALAMrs-RooT. Tolerably com- 

 mon on the borders of swamps and along streams. Leaves re- 

 sembling those of Typha; scapes similar to the leaves, the spa- 

 dix borne on one edge near the top ; rootstock thick, creeping, 

 valued for its aromatic flavor and warm, pungent taste. 



LEMNACE/E. 



SPIRODELA ScHLEiD. 



5. polyrhiza (L.) Schleid. Duck Weed. Dlxk Meat. Very 

 abundant in stagnant pools and slow streams throughout our 

 range, floating on the surface of the water. Thallus small, 

 round-obovate, with a cluster of rootlets from the center of the 

 under surface. In autumn the fronds develop minute bulblets, 

 which sink to the bottom to rise and vegetate in spring. One 

 of the smallest of flowering plants, but often found in such abun- 

 dance as to hide the water in which it grows. 



LEMNA L. 



L. minor L. Small Dick Weld. Less common than the pre- 

 ceding and found in the same places. Thallus obovate; root 

 solitary. 



L. trisuica L. I\ v-lk.wku Di < k Wkkm. Siar Dk k Weed. 

 Brisbin swamp, Coville. The only station. 



