42 RANTJNCtJLACE^E. (CROWFOOT FAMILY.) 



met with in this country (shore of L. Ontario, and northward), a 

 span high, with flowers 3 - 5" in diameter, passing into 



Var. reptans, E. Meyer. (CREEPING S.) Small, slender, the filiform 

 creeping stems rooting at all the joints ; leaves linear, spatulate, or oblong (i- 1' 

 long) ; flowers small. Gravelly or sandy banks ; Newf . to Penn., north and 

 westward. June - Sept. (Eu.) 



7. R. oblongifdlius, Ell. Usually annual; stem erect or ascending, 

 often pubescent below, slender (1-2 high), diffusely branched above and 

 many -flowered ; leaves serrate or denticulate, lower long-petioled, ovate or 

 oblong (-!' long), uppermost linear; flowers 3-5" broad; petals 5, bright 

 yellow, 1 -3" long; carpels minute, almost globular, the small style deciduous. 

 Wet prairies, 111., Mo., and in S. States. June. 



8. R. pusillus, Poir. Stem ascending, weak, loosely branching (6-18' 

 long) ; leaves entire or obscurely denticulate, the lowest round-ovate or heart- 

 shaped (' long), long-petioled, the upper oblong or lanceolate (1 - Id' long) ; 

 flowers very small ; petals 1-5, yellowish ; stamens 3 - 10 ; carpels very turgid, 

 smooth or slightly papillose, tipped with a minute sessile stigma. Wet places, 

 S. New York, and southward along the coast. June - Aug. 



- *- -i- Terrestrial, but often in wet places ; leaves mostly cleft or divided. 

 *+ Root-leaves not divided to the very base ; achenes marginless. 



9. R. affinis, R. Br. Somewhat hairy or glabrous ; low or slender, 1 high 

 or less ; leaves pedately cleft, the cauline with linear or narrow oblanceolate 

 divisions; petals light yellow, 3- 4" long or smaller; heads oblong; achenes 

 turgid y with small and mostly recurved style, pubescent or glabrous. And 

 var. VALIDUS, Gray, stouter and with more fleshy leaves, the lower mostly 

 undivided and roundish, cordate, truncate or cuneate at base, coarsely crenate 

 or more or less cleft. Minn., Iowa, north and westward. 



10. R. rhomboideus, Goldie. Low (3-8' high), hairy; root-leaves 

 roundish or rhombic-ovate, rarely subcordate, toothed or crenate ; lowest stem- 

 leaves similar or 3 - 5-lobed, the upper 3 - 5-parted, almost sessile, the lobes 

 linear ; carpels orbicular with a minute beak, in a globose head ; petals lair/?, 

 deep yellow. Prairies, Mich, to N. 111., Minn., and northward. April, 

 May. 



11. R. abortivus, L. (SMALL-FLOWERED C.) Biennial, gla brous, branch- 

 ing, 6' -2 high; primary root-leaves round heart-shaped or kidney-form, barely 

 crenate, the succeeding often 3-lobed or 3-parted; those of the stem arid 

 branches 3 - 5-parted or divided, subsessile, the divisions oblong or narrowly 

 wedge-form, mostly toothed ; head globose; carpels mucronate, with a minute 

 curved beak; petals pale yellow , shorter than the small refiexed calyx. Shady 

 hillsides and along brooks, common. April- June. 



Var. micranth.US, Gray. Pubescent, roots often fusiform-thickened ; 

 root-leaves seldom at all heart-shaped, some 3-parted or 3-divided ; peduncles 

 more slender and carpels fewer. E. Mass, to 111., Minn., and westward. 



12. R. sceleratus, L. (CURSED C.) Annual, 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 nearly 

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



