162 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 



Montana: Flodman & Rydberg, 1895; F. V. Hayden, No. 130, 1854. 



Utah: Watson, No. 340, 1869. 



Newfoundland: Robinson & Schrenk, No. 42, 1894. 



Greenland: Komerup;* Hartz.* 



6. COMARUM L. 



Gomarum L. Sp. PL 602. 1753. 



Pancovia Heist; Adans. Fam. 2: 294. 1763. 



Potentilla Scopoli, Fl. Carn. Ed. 2, 359. In part. 1772. 



Argentina Lam. Fl. Frang. 3: 118. In part. 1778. 



Hypanthium almost flat, or slightly saucer-shaped, enlarging in fruit, more or less 

 tinged with red. Bractlets, sepals and petals 5. Petals red, ovate, acuminate. Stamens 

 20-25, inserted near the base of the receptacle ; filaments filiform, but rather stout ; an- 

 thers fiat, cordate at the base, attached by the back, and opening by longitudinal mar- 

 ginal slits. Receptacle hemispherical, enlarging in fruit and becoming ellipsoid and 

 spongy. Pistils numerous; style lateral, filiform. Seeds amphitropous. 



Onl}'- one species. 



I. Comarum palustre L. 



Gomarum palvMre L. Sp. PL 502. 1 753. 



L. Sp. PL Ed. 2, 718; Mueller, FL Dan. pi 636; Mill, Gard. Diet. Ed. 8; Ait. Hort. 

 Kew. 2 : 219; Ed. 2, 3: 282; Willd. Sp. PL 2 : 1119; Pers. Syn. 2: 58; Poir. in Lam. 

 Enc. Math. Suppl. 2 : 316 ; Don, Gard. Diet. 2 : 562 ; Dietr. Syn. Plant. 3 : 194. 



Michx. FL Bor. Am. 1 : 302; Pursh, Fl. Am. Sept. 356; Bigelow, FL Bost. 123; 

 Ed. 2: 203; PL Bost. 216; Nutt. Gen. 1 : 311 ; Torr. & Gray, Fl. N. Am. 1 : 447 ; Eat. 

 Man. Ed. 2: 210; Ed. 3: 245; Ed. 5: 182; Ed. 6: 103; Ed. 7: 253; Torr. FL N. Y. 1 : 

 211; Eat. & Wr. N. Am. Bot. 204; Gray, Man. 123; Newberry, Pac. R. R. Rep. 6 : 71 ; 

 Cooper, ihid. 12: Book 2, 56; Britt. & Brown, IIL FL 2: 217; Howell, Fl. N. W. 

 Am. 1: 174. 



Richards. Frankl. Journ. 739 ; Ed. 2, Suppl. 1 2 ; Ledeb. Fl. Ross. 2 : 62 ; Seem. 

 Bot. Herald, 29 ; Hook. f. Arct. PL 290 ; Provaiicher, Fl. Can. 190. 



Potentilla paluatriii Scop. Fl. Carn. Ed. 2: 359. 1772. 



Lehm. Mon. Pot. 21 and 52 ; Sprengel, Syst. Veg. 2 : 536 ; Lehm. Rev. Pot. 73 ; 

 AValp. Ann. 2: 483. 



Torr. Fl. U. S. 498; Comp. 211 ; Gray, Man. Ed. 2: 119; Ed. 5: 155; Wood, Bot. 

 & Fl. 107 ; Torr. Wilkes' Exp. 290; Knowl. Proc. U. S. Nat. Mus. 1885 : 215; Stejne- 

 ger, ibid. 532; Wats. Proc. Am. Acad. 8: 560; Brew. & Wats. Bot. Cal. 1: 180; 



