234 CLASS XIII. ORDER VI. 



the seeds appearing like tufts of wool. Grows iu low ground. — 

 Very abundant on the banks of the Neponset river, Milton. — 

 August. 



242. ATRAGENE. 



Atragene Americana. Sims. Atragcne. 



Leaves in whorls of fotirs, ternate ; leafets cordate, 

 SLibentire ; nectaries acnte. 

 Syn. Clematis vekticillaris. De Camhlle. 



An elegant climbing vine with large flowers. The stem gives 

 off opposite axillary buds, out of each of which proceed two 

 ternate leaves and a fine purple flower. Petals four, oblong- 

 ovate, ciliate, an inch or more in length. — In Brooklyn, Connec- 

 ticut, and in Vermont. — June. 



243. THALICTRUM. 



Thalictrum dioicum. L. Early Thalictrum. 



Flowers dioecious: filaments filiform: leafets round- 

 ish, with obtuse lobes. 



. A small species, flowering in woods early in May. Stem 

 smooth, very slightly furrowed, jointed. Leaves compounded 

 twice or more; leafets smooth, thin, roundish or reniform, paler 

 beneath, with rounded lobes and teeth. Flowers panicled. Co- 

 rolla of about five oval, obtuse, purplish petals. The barren 

 flowers have many stamens with capillary filaments, and oblong, 

 brown or purplish, and sometimes yellow anthers. The fertile 

 flowers are smaller and less crowded. Germs from four to 

 twelve, with curved stigmas. Seeds oval, furrowed, tipt with 

 the style. 

 Thalictrum corynellum. Dc Cand. Meadow Thalictrum. 



Flowers polygamous; lilainents clavate: fruit ses- 

 sile, striate ; leafets obtusely three lobed, pale under- 

 neath. 

 Syti. Thalictrum poltganum. Muhl? 



A tall plant, common in meadows. Stem erect three or four 

 feet high, smooth, furrowed, jointed. Leaves more than decom- 



