\ 



296 



RANUXCULACEAE 



Lobes of the upper stem-leaves elliptical, oval or obovate. 



Lobes of the upper stem-leaves linear to oblong ^°' ^' ^^^^^^^°^^''i- 

 Stem about 2 dm. high; lateral lobes of the basal leaves 2-3-toothed. 



Stem less than 1 dm. high; lateral lobes of the bafaV ifav^'^i-S-toothed. 

 Plant more or less pubescent. ||- ^ H'aliT'^'''' 



One species. ^- Di«"ati. 



24. R. Jovis. 



VI. Triternati. 

 Plant l|5..ta„ I dm flBhjPetah about 5 m„. long; se^ents of the leave, ver, short. 



tovm not Aa^owPd Hn^^'n ^^ ^^F^? ^^''''^^^ segments narrowly linear, almost fili- 

 lorm, not narrowed downward: stems 1-2-flowered: roots fleshy-flbrous. 



-,^,T T^ 27. R, adoneus, 



yil. Pygmaei, 



Sepals glabrous or nearly so; lateral lobes of the basal leaves 2~3-toothed. 



Sepals copiously pubescent: lateral lobes of the basal leaves 4-5-tooth^d.^^^"''''"^" 



,,,-T - 22. R. verecundus, 



VIIT. Abortivi. 



Basal leaves, at least some of them, merely crenate 

 Achenes pubescent; heads oblong to cylindrical ' 



pS wantfn^'s%^i?A^^^^ . " ^^- «- rnicropetalus. 



minute 



5!f^i ^i^?^?^ cordate at the base; plant glabrous 30 R ahortivus 



sirSni^W^^^^ ^^^'^^'^ ^' '^^ ^^^^' P^^^** especiall? the sS with 

 All the leaves divided or lobed; annuals. l\: g; TcS^^^^"' 



Recuhvati 



"^^""■"^^^ali^o^b^o^^i^ten'iy dlSni"'^^^ ^"^^^ ^^^^-^'-'^ "^^''^^ -*« ^ ^^--b- - 

 Petals 2-3 mm. long. 



Stemglabrous; achenes glabrous. ' oo r nnnnln'<H 



*'"'^\SlaU''ovi'te^~or^?r.tlP!^?'-^^^^ l^^''^ «f*«" biternateiy clfftlnto linear, 



PubtsTeS of "h'e^ltem^'i^rts* ed ""^^^^ ,« p ., . 



Pubescence of the stem spreading ^®- -^^ "crt/ormjs. 



Stem low and slender, seldom more than 3 dm. high; petals oblong to oval. 

 Stem tall. 5-10 dm. high; petals broadly obovate. IL" f SanS. 



Petals less than 1 cm. long ^ Repentes. 



f laS^ iS:^fv%u"bSn^- 39. R. or.,an.5. 



ilt^I ^i ISI gfot'oll'^7-t& thTcL ' °^'"- ^^^'^^ ^°- ^- ^— ^'-«-'- 



^^""bllk half as°hi!f.^°«'i^;hP/r*,'"^ '/fr^"*£ «f *^e l«^^e« cuneate at the base; 

 r>i^^ ^ -^^ v'^S ^^ **i® t»od>' of the achene. 41 R Macounii 



"^of Fh^lower^eav^es'^morP or^f "^*^f • ''"^""^ ^* *h« nod^:?fimarrsegments 

 onfr-third as lonra«?i?rH^H ^'^^s truncate or subcordate at the basi; beak 



Petals more th^aTK. fo^l^siVJ^^et^,!'' *^^ -^-«- ^ «; ^^- '-"• 



One species. ^^- A<^REs. 



XII. HrspiDi. 



44. i2. acm. 



46. R. orihorhynchus 



XIII. MULTIFIDI. 



twcTtiird^'^ long as the achene'' ^'■™^''' ^^^^''^^ ^^'^ «^ dissected; style abo. 



Achenes callous-margined. ' at t> ^ i ^- r i- 



Achenes marffinless. ^^- ^- delphimfohus. 



Achenes marginless 

 Stem glabrous. 

 Stem pubescent. 



48. R. Purshii. 



49. R. limosus. 



