DICOTYLEDONOUS PLANTS. 



HAB. River banks. N. S. and N. to Labrador. July, Aug. 

 If. A very delicate species. Stem 6 12 inches long. Flowers 

 small. Fruit very smooth. Although coming from such high 

 authority, I cannot yet adopt the opinion of Dr. Hooker that 

 this plant is a mere variety of R. fammula. From a comparison 

 of specimens, I am satisfied that our plant is identical with the 

 foreign R. rcjitmis. Filiform Crowfoot. 



5. R. piisillus Pursh : leaves petioled ; lower ones ovate, subdentate ; 

 upper ones linear-lanceolate ; stems many, erect ; pedicels opposite to 

 the leaves, solitary, 1 -flowered. 



HAB. Wet grounds. N. J. to S. Car. June Aug. U. Stems 

 G 12 inches high, weak. Flowers small, pale-yellow. Distin- 

 guished from R. Jlammula by its smaller size, and by its lower 

 leaves being ovate. 



6. R. cymbalaria Pursh : stems sarmentose filiform ; leaves petiolate, 

 smooth, somewhat fleshy, cordate, reniform or ovate, coarsely crenate ; 

 scapes naked, elongated, 3-flowered ; petals linear, as long as the ca- 

 lyx ; carpels stria to. R. cymbalarue, var. americanus De Cand. 



HAB. Salt marshes. N. Y. Mass. Can. to lat. 68 N. and from 

 Hudson's Bay to the summits of the Rocky mountains. July, 

 Aug. Lf. Scapes % 6 inches high. Flmcers small. Fruit ob- 

 long. Its runners are very properly compared by Dr. Smith, to 

 those of the garden strawberry. Sea Croirfoot. 



tt Leaves divided. 



7. R. auricomus Linn. : leaves smooth ; radical ones petioled, cor- 

 date, mostly 3-parted or lobed ; cauline ones sessile, divided into linear, 

 entire or subdentate lobes ; calyx pubescent, shorter than the petals, 

 spreading. 



HAB. Woods and meadows. Penn. Pwsh. May, June. If. 

 Stem a foot or more high. Flowers middle sized. Pursh, I believe, 

 is the only authority for this as an American species. 



Wood Crowfoot. 



8. R. abortivus Linn. : leaves smooth ; radical ones petiolate, cor- 

 date-orbiculate, crenate, sometimes 3-parted ; stem leaves ternate and 

 3 5 cleft, with linear segments ; upper ones sessile ; calyx a little 

 longer than the petals, reflexed. 



HAB. Wet grounds. Throughout the U, S. and Can. July, Aug. 

 L. Stem a foot high, Leaves very variously dissected, mostly 

 smooth, sometimes pubescent. Flowers small, yellow, the pe- 

 tals being sometimes twice as long as the calyx. Carpels com- 

 pressed, forming an ovate or nearly globose head. R. rtitidus of 

 Walter, is a variety of this species, differing only in size, being 

 nearly twice as large, 



9. R. sceleratus Linn. : leaves smooth ; radical ones petioled, 3-part- 

 ed, the segments lobed ; cauline ones 3-lobed, lobes oblong, linear, en- 

 tire ; calyx smooth ; carpels small, numerous, forming an oblong head. 



HAB. Wet grounds. From lat. 67 N. to S. Car. May Aug. 

 24. Stem a foot high, branched, succulent. Flowers small. 

 The plant is almost entirely glabrous. Celery leaved Crowfoot. 



