CKOWFOOT FAMILY. 39- 



§ 1. Atyyfylic; the leaves all or mostly under water, and repeatedly dis- 

 sected into many capillary divisions; flowering all summer* 



# Petals white, or ontym6<fyqwJ/eUow. 



' H. circinatus, Sibth. Stiff Water," Growijot. Leaves sessile, stiff, 

 and rigid enough to keep their snaps: (spreading in a circular: outline) 

 when drawn out of water. Rarer than the next. . ,j ■■ 



H. aquatilis, var. trichophyllus, Gray, White W. Capillary leaves 

 petioled, collapsing into a tuft wjien drawn out of the water ; petals small, 

 white, or yellow only -at the Uaseywhere they bear a spot or little pit, but 

 no. scale; akenes wrinkle/l-crosswise. Comnxpn. , ... >. 



/< ' i';' c * !> '** Petals bright yelitiw. ~i 



s H. multffiduB, Pursh. Yellow W. Leaves under water, mucin like 

 thbse of the White Water Crowfoots, or rather larger ; but the 'bright 

 yellow petals £/ lpng», with a little scale at th& base. 



§ 2. Terrestrial, many in wet places, but naturally growing with the foliage 

 out "of, water'; petals with a little scale at the base, yellow in all the wild 



™ ' » Akenes striate, or ribbed down the sides. ® 



H. Cymbalaria, Pursh. Sea side Crowfoot. A little plant of sandy 1 

 shores of the sea and Great Lakes, etc, smooth, with naked flowering 

 stems 2'-6' high; and long runners ; lekves rounded and kidney-shaped, 

 coarsely crenate ; flowers small in summer. i 



#"* Akenes not prickly nor bristly nor -striate on the sides. % 



*- Speabwobts; growing in very wetiplaces, with entire or merely toothed 



leaves, all, or all but the lowest, lanceolate or linear ; flowers all summer. : 



++ Pistils flattened,* pointed, or beaked. 



R. ambigens, Wats. Water Plantain Speabwobt.., Stems ascend- 

 ing, 1°— S°. high ; leaves lanceolate, or the lowest oblong ; flower fully £' 

 in diameter ; akenes beaked with a straight and slender style. Common. 



R. Flammula, Linn. Smaller Sfearwort. Smaller than' the last, 

 and akenes' short-pointed ; rare N., but very common along borders of 

 ponds and rivers is the '\, _V 



Var. re'ptans, Meyer, or'CREEPrNci S., with slender stems creeping a few 

 inches in length ; leaves linear or spatulate, seldom 1' long ; flower only J' 

 tiros (i 



++ ++ Pistils globular, pointless. Stems not rooting. 



R. oblongifdlius, Ell. Diffusely branched above and many-flowered ; 

 leaves serrate or denticulate; lower ovate or oblong, upper linear. HI., 

 Mo., and So. States. 



R. pusillus, Poir. Differs from the preceding chiefly in the broader 

 entire leaves ; the lower round, ovate, or heart-shaped, upper oblong or 

 lanceolate. N. Y. and S. along the coast. 



*- 1- Crowfoots in wet or moist places, with all or at least the upper leaves 



Z^parted or divided. 



** Boot-leaves roundish, crenate, or toothed, but not lobed or cleft. 



R. rhombofdeus, Goldie. Hairy, 3'-8' high ; petals large, deep yellow. 

 Prairies, Mich, to N. 111., Minn, and W. 



R. abortlvus, Linn. Very smooth and slender (rarely pubescent = 

 var. micranthus), 6'-2° high; petals shorter than sepals, pale yellow. 

 Very common in shady moist places m spring. ".;:. 



*+ ++ Moot-leaves variousty'<lbbed, cleft, or parted.. [''-. ' 

 .. '. ,: ,.;= Pistils in oblong pi; cylindrical clusters. . i 



H. afrlnis, R. Br. Low or "slender, 1Q high or less ; root-leave*! pedately 

 many-cleft ; styles recurved. Iowa, N., and W. > i. 



