100 NORTH AMERICAN FLORA [VOLUME 25 



1. Floerkea occidentalis Rydb. Mem. N. Y. Bot. 

 Gard. 1 : 268. 1900. 



Floerkea proserpinacoides S. Wats. Bot. King's Expl. 50. 1871. Not F. proserpinacoid.es Willd. 

 Very slender glabrous annual ; stem simple or slightly branched, less than 1 dm. high, 

 ascending or decumbent ; leaves 1-3 cm. long, pinnate, glabrous ; divisions 3-5, oblong or 

 oblanceolate to nearly linear, 5-15 mm. long ; peduncles 1-3 cm. long, longer than the peti- 

 oles and often equaling the leaves ; sepals ovate, acute or short -acuminate, 2 mm. or in 

 fruit 3 mm. long; petals oblanceolate or oblong, usually less than 1 mm. long; carpels 

 usually 2, globose, 2-2.5 mm. in diameter, with small pyramidal tubercles. 



Type locality : Swan Lake, Yellowstone National Park. 



Distribution : Wet places, from Wyoming and Colorado to California and Washington. 



2. Floerkea proserpinacoides Willd. Neue Schr. Ges. Nat. Freunde 

 Berlin 3 : 449. 1801. 



Floerkea lacustris Pers. Syn PI. 1 : 393. 1805. 



Nectris pinna/a Pursh, Fl. Am. Sept. 239. 1814. 



Floerkea uliginosa Muhl. Cat. 36. 1813. 



Floerkea paluslris Nutt. Gen. 1 : 229. 1818. 



(?) Cabomba pinna la R. & S. Syst. Veg. 7: 1379. 1830. 



Slender glabrous annual ; stem 1-3 dm. high, decumbent or erect, simple or slightly 

 branched; leaves pinnate, 3-6 cm. long; divisions 3-7, oblong, oblanceolate, linear-oblance- 

 olate, or sometimes elliptic, sometimes 2-cleft, 1-2.5 cm. long; peduncles 1-3 cm. long, 

 shorter than the leaves and usually scarcely exceeding the petioles ; sepals lanceolate 

 or lance-ovate, 3 mm. or in fruit 4-5 mm. long, acute; petals oblong or elliptic, 1.5 mm. 

 long; carpels 2-3, 3-4 mm. long, with small pyramidal tubercles. 



Type locality : Pennsylvania. 



Distribution : Wet places from Quebec to New Jersev, Tennessee, Missouri, and Wisconsin. 

 Illustrations : Hook. Jour. Bot. 1 : pi. 113 ; Torr.'Fl. N. Y. pi. 17 ; A. Gray, Gen. 111. 2 : 

 pi. 154; Schnizl. Icon. pi. 259, fig. 16-1$, 24. 



