22 
Canadensis. 
palustris, 
POLYANDRIA, POLYGYNIA. 
cles somewhat naked, flowers drooping, sta- 
mens coloured.—Wilid. and Pursh. 
Purple Meadow-rue. 
About eighteen inches or two feet high. Stem and filaments 
deep reddish-purple; rare. In low meadows near Woodbury, 
scarce. On the margins of a fosse, on the lower or east edge of 
Powelton, but rare. Perennial. June. 
258. HYDRASTIS. Gen. pl. 958. (Ranunculacee.) 
Caliv none. Petals 3. Nectary none. Berry 
compound, granulations 1-seeded. 
1. H: stem above oppositely two-leaved ; leaves 
petiolate, emarginate at the base, palmate, ser- 
rate, incised; peduncle terminal, solitary, one- 
flowered.— Willd. and Pursh. 
Warnera Canadensis, Miler. 
Icon. Mill. ic. t. 285. 
Vellow-root. 
About a foot or fourteen inches high. Flowers small, incon- 
spicuous. Roots very yellow, and yield a fine yellow dye. 
Possesses medicinal properties. A very rare plant in this vi- 
cinity. I have only found it on the high banks of the Wissa- 
hickon, near Germantown. Perennial. April, May. 
259. CALTHA. Gen. pl. 957. (Ranunculacee.) 
Caliv none. Petals 5 to 9. Nectary none. 
Capsules several, many-seeded. 
1. C. stem erect, corymbose, leaves cordate, reni- 
form: lobes spreading, the circumference acute- 
ly-crenate; flowers subsessile, petals ovate.— 
Willd. and Pursh. 
Populago palustris, Scop. 
Icon. Fl. Dan. 668. Engl. Bot. 506. 

