480 



Springs, altitude 1,000 lu., July L'7. Vouugcr specimcus from Little Elk Canyon, 

 altitude 1,100 ni., .June 29, have souiewliat larger and thinner leaves (No. 491). 



Batrachiumdivaricatuni(Schrank) Wiimn. Fl. ^^r•lllrs. 10 (1811): naviineulnsdirari- 

 catufi Rchrank, llaicr. 1"1. ii, 101 (17S9). 



The si)e(iiuens roseinble those of my Xcbraska cDllections, t-xccpt Hint the ])edun- 

 cles are much shorter. 



In brooks: Beaver Creek, near Hufl'alo (iaj). altitude 975 m., June 21 ; Kapid Creek, 

 above Rapid City, altitude 1,000 m.. .Tune 2".; Elk ("reek, altitude 1.100 m.. .June 28 

 (No. 492). 



Cyrtorhyncha cymbalaria (Pursli) Britton, Mem. Torr. Club, v. Ifil (1894); Ran- 

 unciihtu ri/)iih(tl(iri(i I'lirsli, Fl. i, 392 (1814).' 



Around springs; common: Hot Springs, altitude 1,0.")0 m., .Tune 10 (No. 493). 



Ranunculus cardiophyllus Hook. Fl. Hor. Anier. i, 14 (1829). 



This is not ineluded in Coulter's Manual. The rajige is hence extended westward. 

 Tlie petals in my specimen are broadly ovate, large, bright yellow, the sepals very 

 pubescent. 



Custer, altitude 1,625 m., .Tune 4; Kochlord, altitmle 1,(jO0 m., .Tuly 11 (No. 494). 



Ranunculus ovalis Raf. Proc. Dec. 36 (1814). 



Not uncommon in shady places: Custer, altitmle 1,625 ni., May 28. Some speci- 

 mens resemble somewhat the preceding species in size and habit, but the petals are 

 oblong-rhombic (No. 195). 



Ranunculus abortivus L. Sji. PI. i, 551 (1753). 



All specimens collected in the Hills are very slender and with thin leaves. This is 

 especially the case with those from Elk Canyon, altitude 1,200 m., .Tune 29 (No. 496). 

 Those from Rnnkels, altitude 1,300 m., June 29 (No. 497). are more stout and approach 

 the ordinary form. 



Ranunculus .sceleratus I^. Sp. PI. i, .551 (1753). 



In and near streams: Piedmont, altitude 1.000 m.. .Tune 27; Elk Creek, altitude 

 1,200 m., .Tune 29; Roehford, .altitude 1,600 m., July 11 (No. 498;. 



Ranunculus pennsylvanicus L. f. Suppl. 272 (1781). 



Wet places; common: Lead City, altitude 1..500 m.. .Tuly 6; Custer, altitude 1,6.50 

 m., July 1.5' (No. 499). 



Ranunculus macounii Britton, Trans. N. Y. Acad, xii, 3 (1892). 



Hooker, in the Flora Boreali-Americana, describes his /.'. hiii))ithi.-< .is being erect. 

 Dr. Britton, loc. cit., says: 



"This is a spreading or trailing species, not stoloniferous as far as I know." As 

 far as I can judge, there are two forms of this s})ecies ; one, gencirally .ascending, bnt 

 sometimes er«Ht, sometimes even spreading, the other widely trailing and stoloniler- 

 ons. All the specimens from the Black Hills were of the former character, and may 

 be regarded .as the typical /.'. mapouiiii. as they answer best the description of 

 Ii. h'mjndus Hooker, on which Ii. macounii was based. 



Very common throughont the Black Hills: Hot S])rings. altitude 1,050 m., June 15; 

 Hermosa, altitude 1.0.50 m., .lune 23; Lead City, altitude 1,500 m., .Inly 6 (No. .500). 



Aquilegia canadensis L. Sp. PI. i. .533 (17.53). 



Common: b'lipid City, altitude 1,000 m., June 25; Little Elk Canyon, altitude 

 1,100 m., Jum- 28: Roehford, altitude 1,600 m., .July 11 (No. 501). 



Aquilegia canadensis formosa (Fisch.) Coojier. Pac. R. Rep. xii, .55 (1860); .iqui- 

 lei/ia fonnoHii Fisch. ; DC. I'rodr. i, 50 (1824). 



This seems to gr.ade into the preceding, from which it diflers in the shorter spur 

 and longer sepals, which arc about twice the length of the petals. In my specimens 

 the leaves are larger .and more ghiTicous. 



R.arc: Elk Canyon, altitude 1,200 m., .lune 29 (No. 502). 



' See remarks on the synonomy of this species, this volume, p. 148 (1895). 



