RANUXCULACE^E. (CROWFOOT FAMILY.) 9 



orbicular with a minute beak, in a spherical head ; petals large, exceeding the calyx. 

 (Also R. brevicaulis & ovalis, Hook.) Prairies, Michigan and Wisconsin. 

 April, May. Stems 3' -6' high, sometimes not longer than the root-leaves. 

 Flower deep yellow, as large as in No. 12. 



8. R. abortivus, L. (SMALL-FLOWERED CROWFOOT.) Glabrous and 

 very smooth ; primary root-leaves round heart-shaped or kidney-form, barely crenatc, 

 the succeeding ones often 3-lobed or 3-parted ; those of the stem and branches 

 3-5-parted or divided, subsessile; their divisions oblong or narrowly wedge- 

 form, mostly toothed ; carpels in a globular head, mucronate with a minute curvea 

 beak ; petals shorter than the refiexed calyx. Shady hill-sides and along brooks, 

 common. April -June. Stem erect, 6' -2 high, at length branched above, 

 the pale yellow flowers very small in proportion. 



Var. micr&iitliiis* Pubescent; root-leaves seldom at all heart-shaped, 

 some of them 3-parted or 3-divided ; divisions of the upper stem-leaves more 

 linear and entire; peduncles more slender. (B. micranthus, Nutt.) Massa- 

 chusetts (near Boston, C. J. Sprague), Michigan, Illinois, and westward. 



9. R. sceleratus, L. (CURSED CROWFOOT.) Smooth and glabrous ; 

 root-leaves 3-lobed, rounded ; lower stem-leaves 3-parted, the lobes obtusely cut 

 and toothed, the uppermost almost sessile, with the lobes oblong-linear and near- 

 ly entire ; carpels barely mucronulate, very numerous, in oblong or cylindrical heads ; 

 petals scarcely^ exceeding the calyx. Wet ditches : appearing as if introduced. 

 June - Aug. Stem thick and hollow, 1 high. Leaves thickish. Juice acrid 

 and blistering. Flowers small, pale yellow. (Eu.) 



10. R. rccurvatus, Poir. (HOOKED CROWFOOT.) Hirsute; leaves 

 of the root and stem nearly alike, long-petioled, deeply 3-cleft, large, the lobes broad- 

 ly wedge-shaped, 2 - 3-cleft, cut and toothed towards the apex ; carpels in a glob- 

 ular head, flat and margined, conspicuously beaked by the long and recurved hooked 

 styles; petals shorter than the reflexed calyx, pale. Woods, common. May, June. 

 Stem l-2high. 



M. *+ + Leaves all ternately parted, or compound, the divisions cleft : achenia fiat. 

 a. Head of carpels oblong : petals pale, not exceeding the calyx. 



11. R. Peimsylv&niciis, L. (BRISTLY CROWFOOT.) Hirsute with 

 rough spreading bristly hairs ; stem stout, erect ; divisions of the leaves stalked, 

 somewhat ovate, unequally 3-cleft, sharply cut and toothed, acute ; carpels 

 pointed \vith a sharp straight beak. Wet places, common. June -Aug. A 

 coarse plant, 2 -3 high, with inconspicuous flowers. 



b. Head of carpels globular : petals bright yellow, much larger than the calyx. 



12. R. fascicularis, Muhl. (EARLY CROWFOOT.) Low, pubescent 

 with close-pressed silky hairs ; root a cluster of thickened fleshy fibres ; radical 

 leaves appearing pinnate, the long-stalked terminal division remote from the ses- 

 sile lateral ones, itself 3 - 5-divided or parted and 3 - 5-cleft, the lobes oblong or 

 linear ; stems ascending ; petals spatulate-oblong, twice the length of the spread- 

 ing calyx ; carpels scarcely margined, tipped with a slender straight or rather 

 curved beak. Eocky hills. April, May. Plant 5' -9' high; the bright yel- 

 low flower 1' broad; petals rather distant, the base scarcely broader than the 

 icale. 



