ROSACEA. 103 POTENTILLA. 



7. R. occidenta'lis. 



Branches and petides g]a.ucovis and prickly; leaves ternate; leajlets ovate , 

 acuminate, sublobate, doubly serrate, downy beneatli ; petioles terete. A tall, 

 prickly shrub, 5 feet hio-h, common in rocky fields, thickets, &c. Stem round, 

 slender, inclining, conspicuous for its fine glaucous dust Leaflets oval, cov- 

 ered beneath with a whitish down, only the terminal one stalked. Fruit a 

 black, round, compound berry, of a lively, agreeable taste, ripe in July. Flow- 

 ers white, in terminal racemes. May. Black Raspberry. Thimble-hcrry . 



8. R. TRIFLO'RUS. Rich. R. saxatias. Bic. 



Herbaceous, pubescent; stems creeping; leaves ternate; leaflets rhombic, 

 acute, cut-dentate, naked, the odd one stalked ; flou^crs somewhat in Ss, with 

 elongated pedicels. Mountains. Root perennial, but the stems are annual 

 and somewhat herbaceous. Fruit small, black. Flowers white. Jn. 



Three-floiccred Raspberry, 



9. R. Chamjemo'rus. 



Herbaceous; stem decumbent at base, erect, unarmed, 1 -flowered; leaves 

 pimple, cordate-reniform, rugose, with 5 rounded lobes, serrate ; sepals obtuse. 

 An Alpine species of small size, but with large flowers and fruit. Petals 

 white, obovate. Berries red, richly flavored. Flowers in June, July, ripen- 

 ing the fruit in September. Cloud-berry. 



10. R. Id.e'us. 



Leaves 5-pinnate and ternate ; leaflets rhomb-ovate, downy beneath ; jielioles 

 channelled ; stem prickly-hispid ; ^o?ffer5 somewhat panicled. Native of stony 

 woods and thickets, and successtully cultivated in our gardens. An erect, 

 shrubby plant, about 5 feet high. Stem usually covered with bristly thorns, 

 but sometimes quite smooth. Leaflets nearly smooth above, covered with a 

 dense, cotton-like down beneath. Flowers in lax, terminal clusters, white. 

 Fruit dark red, compound berries, highly and richly flavored. In the variety 

 £mtricanus, the leaves are all ternate. Garden Raspberry. 



' 1 9. POTENTI'LLA. 



Calyx concave, deeply 4 — 5-cieft, with an equal number 

 of alternate, exterior segments; petals 4 — 5, obcordate ; sta- 

 mens numerous; filaments slender; ovaries collected into a 

 head on the small, juiceless receptacle. 



Lat. potentia, power ; in allusion to its supposed potency in medicine. Seeds 

 naked, rugose, attached to a small, dry receptacle. Herbs, with pinnately 

 or palmately compound leaves. Flowers solitary or in cymes, yellow or 

 white. 



* Leaves trifoliate. 



1. p. Norve'gica. 



Leaves 3-foliate; stem dichotomous above, erect; peduncles axillary. A 

 hairy plant found in old fields. Stem about 8 inches high, round, forked at 

 top Leaflets stalked, oval, cut-serrate. Stipules large, ovate. Flowers nu- 

 merous, crowded, axillary and terminal. Petals obovate, shorter than calyx, 

 yellow, July. Per. Norway Cinquefoil. 



