CLASS X. ORDER II. 189 



species, oblong, approaching to oval, very slightly toothed. 

 Stems large, erect, rank in their growth, hollow, hairy, bearing 

 heads of small, green flowers, disposed in a sort of panicle ; ca- 

 lyx segments ovate, acute, reflexed ; petals linear reflexed. The 

 root is extremely astringent. — May. — Perennial. 



196. TIARELLA. 



TiARELLA coRDiFOLiA. L. Couwioii Tiarclla. 



Leaves cordate, lobedand toothed, teeth niucroiiate, 

 scape racemed. 



Root creeping and sending out runners. Leaves on long hairy 

 petioles, heart shaped, lobed and toothed, hairy on both sides. 

 Scape round, hairy, often furnished with a leaf. Flowers en- 

 tirely white in a long raceme, with very minute subulate bractes. 

 Segments of the calyx oblong, obtuse. Petals lanceolate, acute, 

 clawed. Filaments longer than the corolla, anthers orange. 

 Germ oval, tapering into two acute unequal styles, which are so 

 closed together as to appear like one. Capsule two valved, the 

 lower valve much the longest, acute, and concave upward, with 

 the upper valve shutting into its cavity. Seeds obovate, smooth, 

 fixed to the sides. — Woods in the interior of the state. At 

 Keene, New Hampshire. — June. 



197. MITELLA. 



MiTELLA DiPHYLLA. L. CommoTi MHella. 



Leaves lobate-angular, toothed; stem erect with a 

 pair of opposite leaves near the top. 



Root leaves on long bristly petioles, heart shaped, lobed, and 

 toothed, covered with scattered bristles. Stem erect, round, 

 bristly, with generally a pair of opposite, ovate cut and toothed 

 leaves half way up. Flowers in a long terminal spike with 

 short peduncles. Calyx hemispherical, with short, acute seg- 

 ments. Petals five, white, beautifully pinnatifid or pectinate, 

 inserted on the calyx between its segments. Stamens ten, 

 short, converging. Styles two, short, diverging. Capsule com- 

 pressed, of two equal semiorbicular valves tipt with the styles. 

 Seeds black, obovate, acute at base. — Woods, Windsor, Ver- 

 rnont, at the foot of Ascutney mountain. — June. — Perennial. 



