123 
ROSACEA. (ROSE FAMILY.) 
peduncles as long as the leaves; achenia very hairy at the insertion, 
otherwise smooth. — Brackish marshes and borders of rivers and 
lakes, especially northward. June - Sept. — Leaves & - 1 2 r long. 
8. P. frilticdsa, L. (Shrubby Cinque-foil.) Stem erect, 
very much branched, bvshy; leaves pinnate; leaflets 5-7, crowded, 
oblong-lanceolate, entire , silky, especially beneath; stipules scale¬ 
like ; flowers numerous (yellow), terminating the branchlets ; achenia 
and receptacle thickly clothed with very long hairs. (P. floribunda, 
Pursh.) — Bog-meadows, more common northward. June-Sept. 
— Shrub 2° -4° high, with many handsome flowers. 
9. P. tridentata, Ait. (Mountain Cinque-foil.) Stems 
low, rather woody and creeping at the base, ascending, several-flow¬ 
ered ; leaves palmate; leaflets 3, wedge-oblong, nearly smooth, 3- 
toothed at the apex; petals white ; achenia and receptacle very hairy. 
— Rocks, on mountains (Catskill, &c.), and in Maine near the level 
of the sea. June.— Stems 4 # - 6' high : leaves thickish. 
13. COmARVM, L. Marsh Cinque-foil. 
Calyx as in Potentilla, but dark-purplish inside. Petals 5, much 
shorter than the calyx, ovate-lanceolate, pointed, somewhat per¬ 
sistent. Stamens numerous, inserted on the thickened hairy 
disk : filaments persistent. Achenia many, heaped on the con¬ 
vex at length enlarged and spongy hairy receptacle: styles lateral, 
deciduous. — A stout perennial herb, ascending from the creeping 
base, with odd-pinnate leaves of 5 - 7 crowded lanceolate-oblong 
leaflets, minutely silky, and large purplish flowers. (Name arbi¬ 
trarily borrowed from that applied by Theophrastus to an Arbutus.) 
1. C. palustre, L. (Potentilla palustris, Scop., ^c.) —Bogs, 
common northward. June. — Stems 1° -2° high: root astringent. 
14. FRAOARIA) Tourn. Strawberry. 
Flowers as in Potentilla. Styles deeply lateral. Receptacle in 
fruit much enlarged and conical, becoming pulpy and scarlet, bear¬ 
ing the minute dry achenia scattered over its surface. — Low 
perennials, with runners, and white cymose flowers on scapes. 
Leaves radical: leaflets 3, obovate-wedge-form, coarsely serrate. 
Stipules cohering with the base of the petiole, which with the 
scapes are usually hairy. (Name from the fragrance of the fruit.) 
— The two species are indiscriminately called Wild Straw¬ 
berry. 
L Virginiiina, Ehrh. .Ichenia imbedded in the deeply pit- 
