MEMOIRS FROM THE DEPARTMENT OF BOTANY OP COLUMBIA UNIVERSITY 59 



branched, the branches generally erect. Stipules .5-1 cm. long, ovate, generally obtuse 

 and subentire. Basal and lower cauline leaves digitate, of 5 leaflets, the upper ternate, 

 all glabrous with ciliated margins and veins beneath, the basal ones with somewhat hairy 

 petioles, Avhich are 5-7 cm. long ; leaflets obovate, deeply toothed toward the ends 

 with rounded obtuse teeth. Pedicels erect. Hypanthium finely villous-hirsute, in fruit 

 5-7 mm. in diameter. Bractlets oblong, obtuse, much shorter than the broadly ovate 

 acute sepals. Petals obcordate, longer than the sepals. 



This species comes very near the Frigidae, especially to P. nana and- P. Friesiana. 

 From the latter it differs little except in the number of leaflets. The leaves are much 

 smaller than those of the other American Aureae, the leaflets being only 10-20 mm. long. 

 The sepals are broadly ovate, while in the rest they are ovate-lanceolate or lanceolate. 

 P. maculata grows in arctic and alpine regions of Europe, in Greenland, the Baffin Bay 

 region and Labrador. It has been regarded as a form of P. nobens, but is best regarded 

 as a distinct species. The true P. ruhens Vill., with thicker firmer larger and more 

 rounded leaves, is probably not found on this side of the Atlantic, being apparently 

 confined to the Alps. The specimens seen are : 



Greenland: Rink; Hornemann ; L. Krumlein, 1877-8; Warming & Holm, 1884; 

 Wm. E. Meehan, No. 20, 1892 ; Rosenvinge, 1886. 



Grinnell Land: A. W. Greely, No. 62. 



Labrador: Anspach, 1873; " Fratres Moravi " (Ex Herb. John Ball) ; Weiz; L. 

 M. Turner, No. 4837 and 4838, 1884. Dr. R. Bell, No. 1485, 1884 (Cape Chudleigh) ; 

 A. C. Waghorne, No. 7308, 1892; No. 15, 1893; S. E. Butler, 1870; A. P. Low, No. 

 4994, 1892 ; Spreadborough, No. 16303 and 16318, 1896. 



Hudson Bay Region: J. M. Macoun, No. 7307, 1887; Spreadborough, 1896. 



35. Potentilla dissecta Pursh. 



Potentilla dissecta Pursh, Fl. Am. Sept. 355. 1814. 



Poir. in Lam. Enc. Meth. Suppl. 4 : 543 ; Sprengel, Syst. Veg. 2 : 536 ; Seringe in 

 DC. Prod. 2: 575; Don, Card. Diet. 2: 560; Dietr. Syn. PI. 3: 180 and 190; Walp. 

 Rep. 2: 35; Ann. 2: 472; Lehm. Stirp. Pug. 3: 20; Rev. Pot. 28. 



Nutt. Gen. N. A. PL 1: 310; Eat. Man. Ed. 5: 344; Ed. 6: 280; Ed. 7: 457; 

 Torr. & Gray, Fl. N. Am. 1: 446; Nutt. Journ. Acad. Phil. 7 : 20; Eat. & Wr. N. Am. 

 Bot. 373 ; Wats. Proc. Am. Acad. 8 : 556^; Porter <fe Coult. Syn. Fl. Colo. 37 ; Brewer & 

 Wats. Bot. Cal. 1: 179; Rothrock, in Wheeler's Rep. 4: 113; Coulter, Man. Rocky 



1 Includes P. Drummondii, etc. 



2 This may refer to some other species, as the description reads " leaflets pinnatifid or coarsely serrate ; tutted ; hairy.' 



