MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY Ss] 
63. Potentilla emarginata Pursh. 
Potentilla emargimata Pursh, Fl. Am. Sept: 353. 1814. 
Poir. in Lam. Ene. Meth. Suppl. 4: 541; Lehm. Mon. Pot. 29 and 174; Sprengel, 
Syst. Veg. 2: 540; Don, Gard. Dict. 2: 551 7 Dictr: Syn. Eli 3: 179) Walp. Rep. 2: 35; 
Ann. 2: 506; Lehm. Rev. Pot. 161. 
Nutt. Gen. N. A. Pl. 1: 310: Eat. Man. Ed. 5: 348: Ed. 6: 280 ; Ed. 7: 456; 
Torr. & Gray, Fl. N. Am. 1: 446; Eat. and Wr. N. Am. Bot. 372; Wats. Proce. 
Am. Acad. 8: 559: Rydb. Bull. Torr. Bot. Club, 23: 305: Britton & Brown, Il. 
Hea Dale 
Wi. Meyer, Pl. Lab. 74: lebm. im Hook. Fl Bor. Am. 1 > 194; Sommerf. in Mag. 
Natury. 2: 244*- Schlecht. Linnea, 10: 98; Seemann, Bot. Herald, 51 and 56; Lange, 
Consp. Fl. Groenl. 8 and 235 ;' Rosenvinge, /. ¢. 655; Macoun, Cat. Cane Bib iE 140) 
Meehan, Proc. Aead. Phil. 1893: 210; Wetherill, Peary Aux Hix: 5: 
Potentilla Fragaria var. emarginata Ser. in DC. Prod. 2: 586. 1825. 
[LLusrrations: Fl. Dan. 13: pl. 2291; Britton & Brown, Ill. FI. if LOLS: 
PuaTE 32, f. 11; dissection of flower, f. 12; pistil, jy. 13; stamen, jf. 17; fruiting hy- 
panthium and ealyx, f. 15. 
Low and densely tufted. Stems about 1 dm. high, 1-2-leaved and 1-2-flowered, 
softly villous-hirsute. Stipules lanceolate or ovate-lanceolate, scarious and brown. 
Leaves ternate with sessile leaflets, softly hirsute; leaflets obovate, with a cuneate entire 
base, deeply serrate toward the apex with acute teeth, of which the terminal is the largest. 
Hypanthium villous-hirsute, in fruit 8-10 mm. in diameter; bractlets oblong-lanceo- 
late, acute, about equalling the slightly broader acute sepals. Petals bre adly obcordate, 
longer than the sepals. 
This species was deseribed fromm specimens collected by Kohlmeister in Labrador. 
According to Lehmann (Hook. Fl. Bor. Am. 1: 194) P. nana also was collected by the 
same missionary. There is, therefore, a doubt which of the two is the original P. emar- 
ginata. The latter, as understood by Vahl, Lehmann and others, is a stouter plant than 
P. nana, has very narrow bracts, and leaves with acute teeth, of which the terminal is 
generally the largest. In both the flowering stems scarcely exceed the leaves. P. emar- 
ginata grows on the Arctic coast of North America, in Labrador, the Baffin Bay region, 
Greenland and Spitzbergen. 
Alaska’: (Pt. Barrow) G. S. Oldmixon, 1882; Mundock, No. 2227, 1896. 
Wrangell Island: J. Muir, 1881. 
Jones Sound: Dr. H. E. Wetherill, Nos. 144 and 160, 1894. 
"Syn. P. fragiformis parviflora Traut. 
