122 
ROSACEJE. (ROSE FAMILY.) 
* Leaves 'palmate : leaflets 3 - 5: flowers yellow. 
1. p. Norvegica, L. (Norway Cinque-foil.) Hairy, 
erect, forked above, many-flowered ; leaflets 3, obovate-oblong, coarsely 
cut-serrate ; calyx longer than the pale yellow petals ; achenia wrinkle 
or ribbed. — A coarse and homely annual or biennial weed, in fields 
and cultivated grounds, certainly native northward. July - Sept. 
2. P. minima, Haller. (Dwarf Mountain Cinque-foil.) 
Dwarf. tufted, pubescent; stems mostly 1 -flowered; leaflets 3, obovate, 
very obtuse, cut-toothed near the apex ; petals longer than the caly x * 
(P. Robbinsiana, Oakes.) — Alpine summits of the White Mts., New 
Hampshire. July. — Plant V — 3 f high : flowers small. 
3. P. Canadensis, L. (Common Cinque-foil or Five- 
Finger.) Hairy or pubescent, procumbent and ascending, producing 
runners ; peduncles axillary, elongated , 1 -flowered; leaflets 5, oblong or 
obovate-wedge-form, cut-toothed towards the apex ; petals longer t lan 
the calyx. (P. sarmentbsa, Muhl.) — Var. 1. pumila is a dwa , 
early-flowering state, in sterile soil. Var. 2. simplex is a taller an^ 
greener state, with slender ascending stems. (P. simplex, Michx.) 
Abounds among grass in dry fields, &c. April - Oct. 
4. P. argentea, L. (Silvery Cinque-foil.) Low; stems 
ascending, cymose at the summit , many-flowered , white-woolly, 
5, wedge-oblong, almost pinnatifid, entire towards the base, ' V1 
revolute margins, green above, white with silvery wool beneath , p e a 
longer than the calyx. — Dry barren fields, &c. June - Sept. 
* * Leaves odd-pinnate : flowers yellow. 
5. P. Pennsylvania, L. (Hoary Cinque-foil.) ^ 
erect, hairy or woolly ; cymose at the summit, many-flowere » ^ 
lets 5-9, oblong, obtuse, pinnatifid, silky-woolly with w U . t0 carce ! 
especially beneath, the upper ones larger and crowded ; p eta s 
ly longer than the calyx. — Pennsylvania ? New Hampshire, fl *■ 
and northward. July. — Plant 1°-2° high. 
§ 2. Style deeply lateral , attached near or below the middle of t e ^ 
6. P. argilta, Pursh. (Crowded Cinque-foil.) ^^ 
erect, tall and stout, brownish-hairy, clammy towards the 
leaves pinnate , the lowest 7 -9-, the upper 3 - 7-foliolate , lea e ^ 
or ovate, incised or doubly serrate, downy underneath , ^f WCTS ^ s . 
mose-clustered ; petals dull yellowish-white , longer than tie 
disk glandular, thickened, somewhat 5-lobed ; achenia g a t0 
thickened style spindle-shaped. —Rocky hills and banks, 
Michigan. July. — Stem mostly simple, 2° - 4° high. 
7. P. Alisei'ina, L. (Silver Weed.) Creeping by 
rooting runners ; ascending stems none; leaves all radical, p 
leaflets 9-19, with minute pairs interposed, oblong, pinnati 
green and nearly smooth above, silvery-white with silky down u 
neath ; stipules many-cleft; flowers solitary (yellow), on »cape 
