Jan., 1915.] The Roses of Ohio. 423 



2. Potentilla argentea L. Silvery Cinquefoil. Stems 3-10 

 in. high, ascending, rather woody at the base; leaflets usually 5, 

 incised, oblanceolate, or obcordate, green and glabrous above, 

 silvery white beneath, calyx white, wooly. Licking, Erie, 

 Cuyahoga. 



3. Potentilla recta L. Upright Cinquefoil. Stems erect, 

 1-1^ ft. high, villous; flowers yellow, about ^4 in. broad, leaves 

 5-7-parted; leaflets oblanceolate or oblong-lanceolate, sparingly 

 pubescent. Hocking, Franklin, Erie, Lake. 



4. Potentilla monspeliensis L. Rough Cinquefoil. Stems 

 erect, 1-2/-^ ft. high, often much branched above; leaflets 1^-2 in. 

 long, obovate, obtuse, pubescent; flowers about f in. broad, 

 yellow; sepals exceeding the petals in length. General in 

 distribution. 



5. Potentilla canadensis L. Common Five-finger. Plants 

 decumbent, often rooting at the tip; stems 5-14 in. high; leaves 

 usually 5-parted; leaflets oblong, serrate, silky hairy beneath; 

 flowers yellow, |— f in. broad. General. 



6. Potentilla pumila Poir. Dwarf Five-finger. Plants very 

 low, with slender prostrate runners; flowering stems upright at 

 first, later producing prostrate runners; leaves 5-parted, silky 

 pubescent; leaflets obovate, lighter beneath, sharply dentate; 

 flowers |-f in. broad, yellow. Lawrence, Monroe, Vinton, 

 Lake. 



7. Potentilla reptans L. European Five-finger. Prostrate 

 herbs with very slender, almost filifomi stems; leaves five-parted; 

 leaflets, cuneate-oblanceolate, dentate almost to the base; flowers 

 yellow, petals obcordate, one-half longer than the sepals. Lake 

 County. 



4. Argentina. Silverweed. 



Low perennial herbs with pinnate leaves and producing long 

 runners; flowers yellow, solitary, appearing from the axils of the 

 leaves; bracts, sepals and petals 5 each; stamens numerous; style 

 lateral; mature achenes with a thick, corky pericarp. 



1. Argentina anserina (L.) Rydb. Silverweed. Leaves 2-9 

 in. long; leaflets f-1 in. long, oblong or oblanceolate, obtuse, 

 under surface white, silky pubescent; flowers yellow, ^-1 in. 

 broad. Lorain, Lucas, Ottawa, Hamilton, Erie, Cuyahoga. 



5. Comarum. Marshlocks. 



Herbs with alternate, pinnate leaves and large purple, solitary 

 or cymose flowers, either terminal or axillary; calyx 5-lobed with 

 5 bracts; petals 5, shorter than the calyx lobes, stamens numerous, 

 inserted on a pubescent receptacle which is spongy in fruit. 



