204 Class XII. Order V. 



among the grass. Leaves pinnate, the large leafets alternating 

 with small ones, green above and of a fine silvery appearance 

 beneath. Flowers yellow, solitary, on long, axillary peduncles. 

 June Perennial. With us this is always a maritime plant. 



POTENTILLA ARGENTEA. L. Hoary Cmquefoil. 



Leaves quinate, wedge form, cut, downy under- 

 neath, stem nearly erect. 



A small, humble species, frequent on Boston common and else- 

 where in dry soils. Stems spreading, half erect, white and 

 downy. Leaves alternate, consisting of rive wedge form or spat- 

 ulate leafets, cut into a few lobes or large teeth at the end, white 

 and downy underneath. Flowers numerous, on the ends of the 

 branches, small, yellow. From June to September. Perennial. 



POTENTILLA SIMPLEX. Mich. Common Cinquefoil or 



Fivefinger. 



Erect, simple, hairy; leaves five-digitate, oblong, 

 oval ; peduncles lateral, solitary, elongated, one flow- 

 ered. Mich. 



Root abrupt. Stem erect at base, reclining at top, rough, 

 hairy. Leafets in fives, oval, deeply serrate, the nerves hairy 

 underneath. Stipules cut into lanceolate lobes. The primary 

 leaves are nearly sessile having in the axil of each a petioled 

 leaf or two, a long filiform peduncle, and sometimes also the 

 rudiment of a branch. Flowers yellow. Petals roundish, in- 

 versely heart-shaped, longer than the calyx. Pastures and 

 woods. May, June. Perennial. 



POTENTILLA SARMENTOSA. Muhl. Running Cinquefoil. 



Stem sarmentose ; leaves quinate, leafets obovate, 

 obtuse, serrate, glabrous above, hairy beneath, petals 

 roundish, longer than the calyx. 



A very delicate species extremely common in dry pastures, 

 spangling the grass with its 3'ellow flowers throughout the month 

 of May. Root somewhat abrupt. Stems procumbent, very short, 

 at the time of the first flowing, but extending a foot or more 



