RdHHi.-idun. llANLNCULACE^i:. 25 



no. 49, Gmel. Fl. Sil)ir. iv. t. 83, f. H), & li. L,i,i;is,li,r/ii, I)(". Pr.xlr. i. .14. R. pu»iUu», IxsUeb. 

 Mem. Acad, rctroji. v. 540, the tl'-pauperate liiyli iiortliuru form. A'. Iimusus, Nutt. iu '1 orr. 

 & Gray, 1. c. 20. Ji. nidicuns, Hegel, IJiUl. Soc. Nat. Mosc. xx.xiv. jtt. 2, 44, 45, not of C. A- 

 Meyer & Ledeh. R. multijidiis, var. ip/xh.s, Wats. 15ol. King. I'.xp. 8, & liil»l. Indi-x, \>0. It. 

 midtijidus, var. liniosus, Lawsou, Kev. Caiiad. Kanuiic. 47. — Western aretif America to 

 Great Slave Lake, soatli to Micliigau, Wa.sliington, and even Now Mexico, Pulmci ; al«o iu 

 cold bogs of Nova Scotia, Tvutmau. 



-J- H— Terrestrial arctic or alpine i)ercnnials (or first .species ampliiltion.s and le.ss alpine), 

 creeping and wholly tibrous-rooling, either from procumb(tnt stems or filiform roul.si<M ks, 

 glabrous ; with rounded leaves palmately 3-5-lobed or jnirleil but not divided nor filiform- 

 dissected : fiowers small : akencs smooth. 



++ Stems leafy and rooting at the nodes : akeues small in a globular head : style .short or 

 hardly any. 



R. natans, C. A. Mkykk. Creeping extensively, rooting in wet mud or floating in .^hallow 

 water: leaves reniform or some with shallow sijius or truncate ba.se, 4 to '.( lines in diameter, 

 with 3 to 5 rouiulish or obovate divei'giug lobes: petals about 2 lines long: carpels very 

 numerous in a globose liead (of a (puirter inch iu diameter) with a tiiick Hesliy reiept:u-le : 

 style extremely short, with a tei-niinal stigma. — Meyer in Ledeb. Ic. t. 114, Fl. Alt. ii. .'11.5, 

 & Fl. Ross. i. 34. R. hifiierboreus, var. iiatuns, Kegel, 1. c. 43 ; Gray, Proc. Acad. I'hilad. 1803, 

 50. R. radicuns, C. A. -Meyer in Ledeb. Ic. t. 116, is a form of the Siime. A*. I'urshii, 

 Terr. Ann. Lye. N. Y. ii. 162, not Richards. — Rocky Mountains of Colorado, subalpiue or 

 lower, //.'/// & Hiivhonr, James, Cou/ttr, Roihrock, Patterson. (N. Asia.) 



R. hyperboreus, Rottb. Terrestrial iu wet soil, small, depressed and creeping : leaves of 

 cuneate or Hahelliform outline, rarely with subcordate bajie (2 to 6 lines broad), 3-lol)ed or 

 almost 3-parted : the lobes obovate or oblong, and the later ones sometimes 2-lobed: petals 

 a line long : carpels fewer in a small head with an oval recej/tacle : style very shi>rt. — Act. 

 Hafn. X. 458, t. 4, f. 16 (Fl. Dan. t. 331 ) ; DC. Syst. i. 272 ; ReicLcnb. Ic. i'l. Crit. i. t. 1 1. 

 f. 21, 22 ; Torr. & Gray, Fl. i. 20. — Labrador, Allen, Bell, to arctic Alaska. (Arct. Asia 

 & Eu., Greenland.) 



++ -H- Scapose from filiform rootstocks: akeues rather few in a loose head with small 

 receptacle, long-styled. 



R. Lapponicus, L. Long filiform runners or root.stocks sending U]» long-])Otioled radical 

 leaves and siiii])le leafless or one-leaved scapes a span high : leaves reniform in outline (an 

 inch iu diameter), 3-parted; divisions flabellate-cuneate, 3-7-lobcd or erenate-inci^ed : petals 

 3 lines long : akeues a line or more long, obliquely ovate, somewhat acute-margined, a little 

 1 mger than the .slender introrsely stigmatose persistent style. — Spec. i. 533 (Fl. Lapp. t. 3, 

 f. 4) ; Wahl. Fl. La])p. t. 8, f. 2 ; Fl. Dan. t. 2292.1 — Western part of arctic America, and 

 Rocky Mountains south to Lat. 54°."^ (N. Asia & Eu., Greenland, &c.) 

 -H- -»— -t— Uliginous or subaquatie, fibrous-rooted, glabrous or nearly so, with leaves all 



entire or merely denticulate or crenulate, petioled. 

 ++ Akenes beakless or nearly so, dull ; the style very short and deciduous or hardly 



any : subannuals ; ours with erect or ascending usually weak stems, sometimes rooting 



from the lower nodes, but hardly .at all thereby perennial : lowest leaves cordate or o\ate 



or oblong and long-petioled : upper lanceolate to linear. 

 = Petals 1 to 3 or occasionally 5, not over a line long, pale vellow : stamens onlv .'> t<) 1(V — 



C<i!<(dca, St. Mil. ■ " 



R. trachyspermus, Enok lm. Stems a span to 2 feet high, sehioui rooting, .and plant 

 ])robal)ly purely anmuxl : carpels somewhat orbicular, tumid-lenticulnr, narrowly maririned, 

 and the faces minutely tuberculo.se, only one third line long, crowded in a cylindniii ..us or 

 oblong head with a narrow receptacle of 2 lines or so in length. — Fngelm. in (ir.iy, PI. 



1 Add syn. Anemone nudicnuli.i, Gray, Hot. G.nz. .\i.l7; st.-e Hrittcn, .Ann. N. Y. Ac.H'I. Sci. 

 vi. 233. 



2 Also north shore of Lake Superior, at Sand Bay, J. C. Jmu.'i, and mar (iraiul Marais, Minn., 

 Cheney, ace. to Coulter & Fisher, Bot. Gaz. xviii. 'I^iK 



