MEMOIRS PEOM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 35 



below ; bractlets lanceolate, nearly equalling the ovate-acuminate sepals. Petals obcordate, dark red, 

 longer than the sepals. 



In the mountains of Central and Southern Mexico. 



J/(>.n>o; G. Schiede (Vallis Tolucensis); C. G. Pringle, Ko. 3615, 1890 ; *Ehrenberg. 



6. Potentilla Ehrenbergiana Schlecht. 



Potentilla Ehrenbergiana Schlecht. Linnaea, 13 : 261 ; Lehm. Eev. Pot. 74 ; Hemsley, Biol. 

 Cent. Am. 1 : 376 : Dietr. Syn. PI. 3 : 189 ; "Walp. Eep. 2 : 31 ; Ann. 2 : 483. 



Illusteation : Lehm. Eev. Pot. pi. S2. 



Stem from a thick ligneous root, ascending, caneseent ; basal leaves petioled, pinnate with 2 or 3 

 approximate pairs of leaflets, green and appressed-pilose above, dirty white-tomentose beneath ; leaf- 

 lets oblong, coarsely incised ; stem leaves few, the upper ternate or simple ; bractlets and sepals lan- 

 colate, the former a little smaller. Petals obcordate, slightly longer than the sepals. 



Central Mexico : * Ehrenberg. 



§2. TORMENTILLAE. 



7. Potentilla Canadensis L. 



Potentilla Canandensis L. Sp. PI. 498. 1753. 



L. Sp. PL, Ed. 2: 713: Poir. in Lam. Eqc. Meth. 5: 595; Willd. Sp. PL 2 : 

 1106 ; Persoon, Syn. PL 2 : 55 ; Nestler, Mon. Pot. 27 & 58 ; Lehm. Men. Pot. 25 & 

 118; SpengeL Syst. Veg. 2: 538; Seringe, in DC. Prod. 2: 575; Don, Gard. Diet. 2 

 552 ; Dietr. Syn. PL 3 : 180 ; Walp. Rep. 2: 34 ; Ann. 2 : 513 ; Lehm. Rev. Pot. 187 



Walt. Fl. Car. 150 ; Michx. Fl. Bor. Am. 1 : 303 ; Pursh, Fl. Am. Sept. 354 ; Ell 

 Sk. Bot. S. C. & Ga. 1 : 574 ; Nutt. Gen. N. A. PL 1 : 310 ; Eat. Man. Ed. 2: 378 ; Ed 

 3 : 407 ; Ed. 5 : 343 ; Ed. 6 : 280 ; Ed. 7 : 457 ; Barton, Comp. Fl. Phil. 236 ; Torr. Fl 

 U. S. 496 ; Comp. 210 ; Darl. Florula Cest. 65 ; Flora Cest. 303 ; Ed. 3 : 78 ; Beck, Bot 

 106 ; Ed. 2 : 99 ; Tdrr. & Gray, Fl. N. Am. 1 : 443 ; Eat. & Wr. N. Am. Bot. 373 ; Torr, 

 FL N. Y. 208; Gray, Man. Ed. 1 : 122; Ed. 2 : 118; Ed. 5 : 154 : NoH, FL Pa. 433 

 Gray, Pac. R. R. Rep. 12 : book 2, part 2 : 39 ; Chapman, FL So. States, 124 ; Darby^ 

 Bot. So. States, 303 ; Wood, Class Book, 342 ; Bot. & Flor. 107 ; Wats. Proc. Am. Acad 

 8 : 562 ; Holz. Cont. U. S. Nat. Herb. 1 : 205 ; Wats. & Coult. in Gray, Man. Ed. 6 : 160 

 Bailey, in Gray, F. F. & G. Bot. Rev. Ed. 152; Rydb. Bull. Torr. Bot. Club, 24 : 10 

 Britt. & Brown, 111. Fl. 2 : 216. 



Lehm. in Hook. FL Bor. Am. 1 : 192; Provancher, FL Can. 188; Macoun, Cat. 

 Can. PL 141. 



Fragaria Canadensis Crantz, Inst. 2 : 178. 



Illustrations : Nestler, Mon. Pot. j9Z. 10. f. 1 ; Britt. and Brown, 111. Fl. 2 : /. 1935. 



Root perennial, branched. Stems few, slender, silky-villous, generally with spread- 



