40 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 



It much resembles species of the following group in general habit, but is a true perennial. Central 

 America and Mexico. 



Guatemala: J. D. Smith, No. 2144, 1890 ; ^Scherzer. 



Potentilla heterosepala Mexicana Fritsch. 



Potentilla heterosepala Mexicana Fritsch, Bot. Jahrb. 11 : 315. 1890. 



Smaller ; stems 3-15 cm. long ; leaves smaller, mostly ternate ; inflorescence more simple ; flowers 

 about 7 mm. in diameter. 



3fexico: *Wawra, No. 913 and 936 ; H. E. Seaton, Ko. 229. 1891. 



§ 4. SUPINAE. 



13. Potentilla paradoxa Nutt. 



Potentilla paradoxa Nutt.; Torr. & Gray, Fl. N. Am. 1 : 437. 1840. 



Lehm. Stirp. Pug. 9 : 74 ; Rev. Pot. 194 ; Walp. Rep. 2 : 32 ; Ann. 2 : 515. 



Gray, PL Wright. 1 : 68 ; 2 : 55; Man. Ed. 2 : 118 ; Ed. 5 : 154 ; Pac. R. R. Rep. 

 12: book 2, part 2 : 39 ; Torr. Mex. Bound. Surv. 64; Wood, Class Book, 343; Bot. 

 & Flor. 107 ; Britton, Bull. Torr. Club, 21 : 31 ; Rydb. Fl. Neb. 21 : 17 ; Bull. Torr. Bot. 

 Club, 23 : 259; Britton & Brown, 111. Fl. 2 : 213. 



Hemsley, Biol. Cent. Am. 1 : 376. 



Potentilla siqyina Michx. Fl. Bor. Am. 1 : 304. 1803. Not L. 



Lehm. Mon. Pot. 20 and 42 (in part) ; Sprengel, Syst. Veg. 2 : 535 ; Don, Gard. 

 Diet. 2 : 557 (in part). 



Pursh, Fl. Am. Sept. 356; Nutt. Gen. N. A. PI. 1 : 310; Eat. Man. Ed. 2: 380; 

 Ed. 7 : 458 ; Torr. Fl. U. S. 498 ; Comp. 210 ; Ann. Lye. Nat. Hist. N. Y. 2 : 197 ; Beck, 

 Bot. 107 ; Ed. 2 : 99 ; Eat. & Wr. N. Am. Bot. 373 ; Wats. Proc. Am. Acad. 8 : 553 ; 

 Coult. Man. Eocky :\Its. 84; Cont. U. S. Nat. Herb. 2 : 106 ; Wats. & Coult. in Gray, Man. 

 Ed. 6 : 159 ; Bailey in Gray F. F. & G. Bot. Rev. Ed. 151. 



Hook. Fl. Bor. Am. 1 : 187 ; Macoun, Cat. Can. PL 136 and 516. 

 •Illustratioxs: Lehm. Rev. Pot. />/. 62, f. 3 ; Britton &, Brown, 111. Fl. 2: /. 1925. 

 PL.4.TE 5,/. 1; dissection of flower,/.;.?; nearly mature pistil,/. 3; stamen,/. 4.; fruiting 

 hypanthium and calyx, /. 5. 



Stem spreading or ascending, seldom erect, about 2-5 dm. high, leafy, at first sub- 

 simple, later much branched, sparingly hairy, or glabrate below, hirsute above. Stipules 

 broadly ovate, acute, 5-15 mm. long, generally toothed and ciliate. Leaves short-peti- 

 oled, pinnate, the lower with 4-5 pairs of leaflets, in age nearly glabrous, and of a light green 



