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, woolv. Licking, Erie, 
Cuyahoga. 
3. Potentilla recta L. Upright Cinquefoil. Stems erect, 
1-1 Jd ft. high, villous; flowers yellow, about 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, \- 2}4 ft. high, often much branched above; leaflets lp 2-2 in. 
long, obovate, obtuse, pubescent; flowers about | 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, §-§ 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-f in. broad, yellow. Lawrence, Monroe, Vinton, 
Lake. 
7. Potentilla reptans L. European Five-finger. Prostrate 
herbs with very slender, almost filiform 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, p 2 -l 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. 
